/* sockjs-client v1.1.2 | http://sockjs.org | MIT license */
(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.SockJS = f()}})(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
    (function (global){
    'use strict';
    
    var transportList = require('./transport-list');
    
    module.exports = require('./main')(transportList);
    
    // TODO can't get rid of this until all servers do
    if ('_sockjs_onload' in global) {
      setTimeout(global._sockjs_onload, 1);
    }
    
    }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
    
    },{"./main":14,"./transport-list":16}],2:[function(require,module,exports){
    'use strict';
    
    var inherits = require('inherits')
      , Event = require('./event')
      ;
    
    function CloseEvent() {
      Event.call(this);
      this.initEvent('close', false, false);
      this.wasClean = false;
      this.code = 0;
      this.reason = '';
    }
    
    inherits(CloseEvent, Event);
    
    module.exports = CloseEvent;
    
    },{"./event":4,"inherits":56}],3:[function(require,module,exports){
    'use strict';
    
    var inherits = require('inherits')
      , EventTarget = require('./eventtarget')
      ;
    
    function EventEmitter() {
      EventTarget.call(this);
    }
    
    inherits(EventEmitter, EventTarget);
    
    EventEmitter.prototype.removeAllListeners = function(type) {
      if (type) {
        delete this._listeners[type];
      } else {
        this._listeners = {};
      }
    };
    
    EventEmitter.prototype.once = function(type, listener) {
      var self = this
        , fired = false;
    
      function g() {
        self.removeListener(type, g);
    
        if (!fired) {
          fired = true;
          listener.apply(this, arguments);
        }
      }
    
      this.on(type, g);
    };
    
    EventEmitter.prototype.emit = function() {
      var type = arguments[0];
      var listeners = this._listeners[type];
      if (!listeners) {
        return;
      }
      // equivalent of Array.prototype.slice.call(arguments, 1);
      var l = arguments.length;
      var args = new Array(l - 1);
      for (var ai = 1; ai < l; ai++) {
        args[ai - 1] = arguments[ai];
      }
      for (var i = 0; i < listeners.length; i++) {
        listeners[i].apply(this, args);
      }
    };
    
    EventEmitter.prototype.on = EventEmitter.prototype.addListener = EventTarget.prototype.addEventListener;
    EventEmitter.prototype.removeListener = EventTarget.prototype.removeEventListener;
    
    module.exports.EventEmitter = EventEmitter;
    
    },{"./eventtarget":5,"inherits":56}],4:[function(require,module,exports){
    'use strict';
    
    function Event(eventType) {
      this.type = eventType;
    }
    
    Event.prototype.initEvent = function(eventType, canBubble, cancelable) {
      this.type = eventType;
      this.bubbles = canBubble;
      this.cancelable = cancelable;
      this.timeStamp = +new Date();
      return this;
    };
    
    Event.prototype.stopPropagation = function() {};
    Event.prototype.preventDefault = function() {};
    
    Event.CAPTURING_PHASE = 1;
    Event.AT_TARGET = 2;
    Event.BUBBLING_PHASE = 3;
    
    module.exports = Event;
    
    },{}],5:[function(require,module,exports){
    'use strict';
    
    /* Simplified implementation of DOM2 EventTarget.
     *   http://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-EventTarget
     */
    
    function EventTarget() {
      this._listeners = {};
    }
    
    EventTarget.prototype.addEventListener = function(eventType, listener) {
      if (!(eventType in this._listeners)) {
        this._listeners[eventType] = [];
      }
      var arr = this._listeners[eventType];
      // #4
      if (arr.indexOf(listener) === -1) {
        // Make a copy so as not to interfere with a current dispatchEvent.
        arr = arr.concat([listener]);
      }
      this._listeners[eventType] = arr;
    };
    
    EventTarget.prototype.removeEventListener = function(eventType, listener) {
      var arr = this._listeners[eventType];
      if (!arr) {
        return;
      }
      var idx = arr.indexOf(listener);
      if (idx !== -1) {
        if (arr.length > 1) {
          // Make a copy so as not to interfere with a current dispatchEvent.
          this._listeners[eventType] = arr.slice(0, idx).concat(arr.slice(idx + 1));
        } else {
          delete this._listeners[eventType];
        }
        return;
      }
    };
    
    EventTarget.prototype.dispatchEvent = function() {
      var event = arguments[0];
      var t = event.type;
      // equivalent of Array.prototype.slice.call(arguments, 0);
      var args = arguments.length === 1 ? [event] : Array.apply(null, arguments);
      // TODO: This doesn't match the real behavior; per spec, onfoo get
      // their place in line from the /first/ time they're set from
      // non-null. Although WebKit bumps it to the end every time it's
      // set.
      if (this['on' + t]) {
        this['on' + t].apply(this, args);
      }
      if (t in this._listeners) {
        // Grab a reference to the listeners list. removeEventListener may alter the list.
        var listeners = this._listeners[t];
        for (var i = 0; i < listeners.length; i++) {
          listeners[i].apply(this, args);
        }
      }
    };
    
    module.exports = EventTarget;
    
    },{}],6:[function(require,module,exports){
    'use strict';
    
    var inherits = require('inherits')
      , Event = require('./event')
      ;
    
    function TransportMessageEvent(data) {
      Event.call(this);
      this.initEvent('message', false, false);
      this.data = data;
    }
    
    inherits(TransportMessageEvent, Event);
    
    module.exports = TransportMessageEvent;
    
    },{"./event":4,"inherits":56}],7:[function(require,module,exports){
    'use strict';
    
    var JSON3 = require('json3')
      , iframeUtils = require('./utils/iframe')
      ;
    
    function FacadeJS(transport) {
      this._transport = transport;
      transport.on('message', this._transportMessage.bind(this));
      transport.on('close', this._transportClose.bind(this));
    }
    
    FacadeJS.prototype._transportClose = function(code, reason) {
      iframeUtils.postMessage('c', JSON3.stringify([code, reason]));
    };
    FacadeJS.prototype._transportMessage = function(frame) {
      iframeUtils.postMessage('t', frame);
    };
    FacadeJS.prototype._send = function(data) {
      this._transport.send(data);
    };
    FacadeJS.prototype._close = function() {
      this._transport.close();
      this._transport.removeAllListeners();
    };
    
    module.exports = FacadeJS;
    
    },{"./utils/iframe":47,"json3":57}],8:[function(require,module,exports){
    (function (process){
    'use strict';
    
    var urlUtils = require('./utils/url')
      , eventUtils = require('./utils/event')
      , JSON3 = require('json3')
      , FacadeJS = require('./facade')
      , InfoIframeReceiver = require('./info-iframe-receiver')
      , iframeUtils = require('./utils/iframe')
      , loc = require('./location')
      ;
    
    var debug = function() {};
    if (process.env.NODE_ENV !== 'production') {
      debug = require('debug')('sockjs-client:iframe-bootstrap');
    }
    
    module.exports = function(SockJS, availableTransports) {
      var transportMap = {};
      availableTransports.forEach(function(at) {
        if (at.facadeTransport) {
          transportMap[at.facadeTransport.transportName] = at.facadeTransport;
        }
      });
    
      // hard-coded for the info iframe
      // TODO see if we can make this more dynamic
      transportMap[InfoIframeReceiver.transportName] = InfoIframeReceiver;
      var parentOrigin;
    
      /* eslint-disable camelcase */
      SockJS.bootstrap_iframe = function() {
        /* eslint-enable camelcase */
        var facade;
        iframeUtils.currentWindowId = loc.hash.slice(1);
        var onMessage = function(e) {
          if (e.source !== parent) {
            return;
          }
          if (typeof parentOrigin === 'undefined') {
            parentOrigin = e.origin;
          }
          if (e.origin !== parentOrigin) {
            return;
          }
    
          var iframeMessage;
          try {
            iframeMessage = JSON3.parse(e.data);
          } catch (ignored) {
            debug('bad json', e.data);
            return;
          }
    
          if (iframeMessage.windowId !== iframeUtils.currentWindowId) {
            return;
          }
          switch (iframeMessage.type) {
          case 's':
            var p;
            try {
              p = JSON3.parse(iframeMessage.data);
            } catch (ignored) {
              debug('bad json', iframeMessage.data);
              break;
            }
            var version = p[0];
            var transport = p[1];
            var transUrl = p[2];
            var baseUrl = p[3];
            debug(version, transport, transUrl, baseUrl);
            // change this to semver logic
            if (version !== SockJS.version) {
              throw new Error('Incompatible SockJS! Main site uses:' +
                        ' "' + version + '", the iframe:' +
                        ' "' + SockJS.version + '".');
            }
    
            if (!urlUtils.isOriginEqual(transUrl, loc.href) ||
                !urlUtils.isOriginEqual(baseUrl, loc.href)) {
              throw new Error('Can\'t connect to different domain from within an ' +
                        'iframe. (' + loc.href + ', ' + transUrl + ', ' + baseUrl + ')');
            }
            facade = new FacadeJS(new transportMap[transport](transUrl, baseUrl));
            break;
          case 'm':
            facade._send(iframeMessage.data);
            break;
          case 'c':
            if (facade) {
              facade._close();
            }
            facade = null;
            break;
          }
        };
    
        eventUtils.attachEvent('message', onMessage);
    
        // Start
        iframeUtils.postMessage('s');
      };
    };
    
    }).call(this,{ env: {} })
    
    },{"./facade":7,"./info-iframe-receiver":10,"./location":13,"./utils/event":46,"./utils/iframe":47,"./utils/url":52,"debug":54,"json3":57}],9:[function(require,module,exports){
    (function (process){
    'use strict';
    
    var EventEmitter = require('events').EventEmitter
      , inherits = require('inherits')
      , JSON3 = require('json3')
      , objectUtils = require('./utils/object')
      ;
    
    var debug = function() {};
    if (process.env.NODE_ENV !== 'production') {
      debug = require('debug')('sockjs-client:info-ajax');
    }
    
    function InfoAjax(url, AjaxObject) {
      EventEmitter.call(this);
    
      var self = this;
      var t0 = +new Date();
      this.xo = new AjaxObject('GET', url);
    
      this.xo.once('finish', function(status, text) {
        var info, rtt;
        if (status === 200) {
          rtt = (+new Date()) - t0;
          if (text) {
            try {
              info = JSON3.parse(text);
            } catch (e) {
              debug('bad json', text);
            }
          }
    
          if (!objectUtils.isObject(info)) {
            info = {};
          }
        }
        self.emit('finish', info, rtt);
        self.removeAllListeners();
      });
    }
    
    inherits(InfoAjax, EventEmitter);
    
    InfoAjax.prototype.close = function() {
      this.removeAllListeners();
      this.xo.close();
    };
    
    module.exports = InfoAjax;
    
    }).call(this,{ env: {} })
    
    },{"./utils/object":49,"debug":54,"events":3,"inherits":56,"json3":57}],10:[function(require,module,exports){
    'use strict';
    
    var inherits = require('inherits')
      , EventEmitter = require('events').EventEmitter
      , JSON3 = require('json3')
      , XHRLocalObject = require('./transport/sender/xhr-local')
      , InfoAjax = require('./info-ajax')
      ;
    
    function InfoReceiverIframe(transUrl) {
      var self = this;
      EventEmitter.call(this);
    
      this.ir = new InfoAjax(transUrl, XHRLocalObject);
      this.ir.once('finish', function(info, rtt) {
        self.ir = null;
        self.emit('message', JSON3.stringify([info, rtt]));
      });
    }
    
    inherits(InfoReceiverIframe, EventEmitter);
    
    InfoReceiverIframe.transportName = 'iframe-info-receiver';
    
    InfoReceiverIframe.prototype.close = function() {
      if (this.ir) {
        this.ir.close();
        this.ir = null;
      }
      this.removeAllListeners();
    };
    
    module.exports = InfoReceiverIframe;
    
    },{"./info-ajax":9,"./transport/sender/xhr-local":37,"events":3,"inherits":56,"json3":57}],11:[function(require,module,exports){
    (function (process,global){
    'use strict';
    
    var EventEmitter = require('events').EventEmitter
      , inherits = require('inherits')
      , JSON3 = require('json3')
      , utils = require('./utils/event')
      , IframeTransport = require('./transport/iframe')
      , InfoReceiverIframe = require('./info-iframe-receiver')
      ;
    
    var debug = function() {};
    if (process.env.NODE_ENV !== 'production') {
      debug = require('debug')('sockjs-client:info-iframe');
    }
    
    function InfoIframe(baseUrl, url) {
      var self = this;
      EventEmitter.call(this);
    
      var go = function() {
        var ifr = self.ifr = new IframeTransport(InfoReceiverIframe.transportName, url, baseUrl);
    
        ifr.once('message', function(msg) {
          if (msg) {
            var d;
            try {
              d = JSON3.parse(msg);
            } catch (e) {
              debug('bad json', msg);
              self.emit('finish');
              self.close();
              return;
            }
    
            var info = d[0], rtt = d[1];
            self.emit('finish', info, rtt);
          }
          self.close();
        });
    
        ifr.once('close', function() {
          self.emit('finish');
          self.close();
        });
      };
    
      // TODO this seems the same as the 'needBody' from transports
      if (!global.document.body) {
        utils.attachEvent('load', go);
      } else {
        go();
      }
    }
    
    inherits(InfoIframe, EventEmitter);
    
    InfoIframe.enabled = function() {
      return IframeTransport.enabled();
    };
    
    InfoIframe.prototype.close = function() {
      if (this.ifr) {
        this.ifr.close();
      }
      this.removeAllListeners();
      this.ifr = null;
    };
    
    module.exports = InfoIframe;
    
    }).call(this,{ env: {} },typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
    
    },{"./info-iframe-receiver":10,"./transport/iframe":22,"./utils/event":46,"debug":54,"events":3,"inherits":56,"json3":57}],12:[function(require,module,exports){
    (function (process){
    'use strict';
    
    var EventEmitter = require('events').EventEmitter
      , inherits = require('inherits')
      , urlUtils = require('./utils/url')
      , XDR = require('./transport/sender/xdr')
      , XHRCors = require('./transport/sender/xhr-cors')
      , XHRLocal = require('./transport/sender/xhr-local')
      , XHRFake = require('./transport/sender/xhr-fake')
      , InfoIframe = require('./info-iframe')
      , InfoAjax = require('./info-ajax')
      ;
    
    var debug = function() {};
    if (process.env.NODE_ENV !== 'production') {
      debug = require('debug')('sockjs-client:info-receiver');
    }
    
    function InfoReceiver(baseUrl, urlInfo) {
      debug(baseUrl);
      var self = this;
      EventEmitter.call(this);
    
      setTimeout(function() {
        self.doXhr(baseUrl, urlInfo);
      }, 0);
    }
    
    inherits(InfoReceiver, EventEmitter);
    
    // TODO this is currently ignoring the list of available transports and the whitelist
    
    InfoReceiver._getReceiver = function(baseUrl, url, urlInfo) {
      // determine method of CORS support (if needed)
      if (urlInfo.sameOrigin) {
        return new InfoAjax(url, XHRLocal);
      }
      if (XHRCors.enabled) {
        return new InfoAjax(url, XHRCors);
      }
      if (XDR.enabled && urlInfo.sameScheme) {
        return new InfoAjax(url, XDR);
      }
      if (InfoIframe.enabled()) {
        return new InfoIframe(baseUrl, url);
      }
      return new InfoAjax(url, XHRFake);
    };
    
    InfoReceiver.prototype.doXhr = function(baseUrl, urlInfo) {
      var self = this
        , url = urlUtils.addPath(baseUrl, '/info')
        ;
      debug('doXhr', url);
    
      this.xo = InfoReceiver._getReceiver(baseUrl, url, urlInfo);
    
      this.timeoutRef = setTimeout(function() {
        debug('timeout');
        self._cleanup(false);
        self.emit('finish');
      }, InfoReceiver.timeout);
    
      this.xo.once('finish', function(info, rtt) {
        debug('finish', info, rtt);
        self._cleanup(true);
        self.emit('finish', info, rtt);
      });
    };
    
    InfoReceiver.prototype._cleanup = function(wasClean) {
      debug('_cleanup');
      clearTimeout(this.timeoutRef);
      this.timeoutRef = null;
      if (!wasClean && this.xo) {
        this.xo.close();
      }
      this.xo = null;
    };
    
    InfoReceiver.prototype.close = function() {
      debug('close');
      this.removeAllListeners();
      this._cleanup(false);
    };
    
    InfoReceiver.timeout = 8000;
    
    module.exports = InfoReceiver;
    
    }).call(this,{ env: {} })
    
    },{"./info-ajax":9,"./info-iframe":11,"./transport/sender/xdr":34,"./transport/sender/xhr-cors":35,"./transport/sender/xhr-fake":36,"./transport/sender/xhr-local":37,"./utils/url":52,"debug":54,"events":3,"inherits":56}],13:[function(require,module,exports){
    (function (global){
    'use strict';
    
    module.exports = global.location || {
      origin: 'http://localhost:80'
    , protocol: 'http'
    , host: 'localhost'
    , port: 80
    , href: 'http://localhost/'
    , hash: ''
    };
    
    }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
    
    },{}],14:[function(require,module,exports){
    (function (process,global){
    'use strict';
    
    require('./shims');
    
    var URL = require('url-parse')
      , inherits = require('inherits')
      , JSON3 = require('json3')
      , random = require('./utils/random')
      , escape = require('./utils/escape')
      , urlUtils = require('./utils/url')
      , eventUtils = require('./utils/event')
      , transport = require('./utils/transport')
      , objectUtils = require('./utils/object')
      , browser = require('./utils/browser')
      , log = require('./utils/log')
      , Event = require('./event/event')
      , EventTarget = require('./event/eventtarget')
      , loc = require('./location')
      , CloseEvent = require('./event/close')
      , TransportMessageEvent = require('./event/trans-message')
      , InfoReceiver = require('./info-receiver')
      ;
    
    var debug = function() {};
    if (process.env.NODE_ENV !== 'production') {
      debug = require('debug')('sockjs-client:main');
    }
    
    var transports;
    
    // follow constructor steps defined at http://dev.w3.org/html5/websockets/#the-websocket-interface
    function SockJS(url, protocols, options) {
      if (!(this instanceof SockJS)) {
        return new SockJS(url, protocols, options);
      }
      if (arguments.length < 1) {
        throw new TypeError("Failed to construct 'SockJS: 1 argument required, but only 0 present");
      }
      EventTarget.call(this);
    
      this.readyState = SockJS.CONNECTING;
      this.extensions = '';
      this.protocol = '';
    
      // non-standard extension
      options = options || {};
      if (options.protocols_whitelist) {
        log.warn("'protocols_whitelist' is DEPRECATED. Use 'transports' instead.");
      }
      this._transportsWhitelist = options.transports;
      this._transportOptions = options.transportOptions || {};
    
      var sessionId = options.sessionId || 8;
      if (typeof sessionId === 'function') {
        this._generateSessionId = sessionId;
      } else if (typeof sessionId === 'number') {
        this._generateSessionId = function() {
          return random.string(sessionId);
        };
      } else {
        throw new TypeError('If sessionId is used in the options, it needs to be a number or a function.');
      }
    
      this._server = options.server || random.numberString(1000);
    
      // Step 1 of WS spec - parse and validate the url. Issue #8
      var parsedUrl = new URL(url);
      if (!parsedUrl.host || !parsedUrl.protocol) {
        throw new SyntaxError("The URL '" + url + "' is invalid");
      } else if (parsedUrl.hash) {
        throw new SyntaxError('The URL must not contain a fragment');
      } else if (parsedUrl.protocol !== 'http:' && parsedUrl.protocol !== 'https:') {
        throw new SyntaxError("The URL's scheme must be either 'http:' or 'https:'. '" + parsedUrl.protocol + "' is not allowed.");
      }
    
      var secure = parsedUrl.protocol === 'https:';
      // Step 2 - don't allow secure origin with an insecure protocol
      if (loc.protocol === 'https' && !secure) {
        throw new Error('SecurityError: An insecure SockJS connection may not be initiated from a page loaded over HTTPS');
      }
    
      // Step 3 - check port access - no need here
      // Step 4 - parse protocols argument
      if (!protocols) {
        protocols = [];
      } else if (!Array.isArray(protocols)) {
        protocols = [protocols];
      }
    
      // Step 5 - check protocols argument
      var sortedProtocols = protocols.sort();
      sortedProtocols.forEach(function(proto, i) {
        if (!proto) {
          throw new SyntaxError("The protocols entry '" + proto + "' is invalid.");
        }
        if (i < (sortedProtocols.length - 1) && proto === sortedProtocols[i + 1]) {
          throw new SyntaxError("The protocols entry '" + proto + "' is duplicated.");
        }
      });
    
      // Step 6 - convert origin
      var o = urlUtils.getOrigin(loc.href);
      this._origin = o ? o.toLowerCase() : null;
    
      // remove the trailing slash
      parsedUrl.set('pathname', parsedUrl.pathname.replace(/\/+$/, ''));
    
      // store the sanitized url
      this.url = parsedUrl.href;
      debug('using url', this.url);
    
      // Step 7 - start connection in background
      // obtain server info
      // http://sockjs.github.io/sockjs-protocol/sockjs-protocol-0.3.3.html#section-26
      this._urlInfo = {
        nullOrigin: !browser.hasDomain()
      , sameOrigin: urlUtils.isOriginEqual(this.url, loc.href)
      , sameScheme: urlUtils.isSchemeEqual(this.url, loc.href)
      };
    
      this._ir = new InfoReceiver(this.url, this._urlInfo);
      this._ir.once('finish', this._receiveInfo.bind(this));
    }
    
    inherits(SockJS, EventTarget);
    
    function userSetCode(code) {
      return code === 1000 || (code >= 3000 && code <= 4999);
    }
    
    SockJS.prototype.close = function(code, reason) {
      // Step 1
      if (code && !userSetCode(code)) {
        throw new Error('InvalidAccessError: Invalid code');
      }
      // Step 2.4 states the max is 123 bytes, but we are just checking length
      if (reason && reason.length > 123) {
        throw new SyntaxError('reason argument has an invalid length');
      }
    
      // Step 3.1
      if (this.readyState === SockJS.CLOSING || this.readyState === SockJS.CLOSED) {
        return;
      }
    
      // TODO look at docs to determine how to set this
      var wasClean = true;
      this._close(code || 1000, reason || 'Normal closure', wasClean);
    };
    
    SockJS.prototype.send = function(data) {
      // #13 - convert anything non-string to string
      // TODO this currently turns objects into [object Object]
      if (typeof data !== 'string') {
        data = '' + data;
      }
      if (this.readyState === SockJS.CONNECTING) {
        throw new Error('InvalidStateError: The connection has not been established yet');
      }
      if (this.readyState !== SockJS.OPEN) {
        return;
      }
      this._transport.send(escape.quote(data));
    };
    
    SockJS.version = require('./version');
    
    SockJS.CONNECTING = 0;
    SockJS.OPEN = 1;
    SockJS.CLOSING = 2;
    SockJS.CLOSED = 3;
    
    SockJS.prototype._receiveInfo = function(info, rtt) {
      debug('_receiveInfo', rtt);
      this._ir = null;
      if (!info) {
        this._close(1002, 'Cannot connect to server');
        return;
      }
    
      // establish a round-trip timeout (RTO) based on the
      // round-trip time (RTT)
      this._rto = this.countRTO(rtt);
      // allow server to override url used for the actual transport
      this._transUrl = info.base_url ? info.base_url : this.url;
      info = objectUtils.extend(info, this._urlInfo);
      debug('info', info);
      // determine list of desired and supported transports
      var enabledTransports = transports.filterToEnabled(this._transportsWhitelist, info);
      this._transports = enabledTransports.main;
      debug(this._transports.length + ' enabled transports');
    
      this._connect();
    };
    
    SockJS.prototype._connect = function() {
      for (var Transport = this._transports.shift(); Transport; Transport = this._transports.shift()) {
        debug('attempt', Transport.transportName);
        if (Transport.needBody) {
          if (!global.document.body ||
              (typeof global.document.readyState !== 'undefined' &&
                global.document.readyState !== 'complete' &&
                global.document.readyState !== 'interactive')) {
            debug('waiting for body');
            this._transports.unshift(Transport);
            eventUtils.attachEvent('load', this._connect.bind(this));
            return;
          }
        }
    
        // calculate timeout based on RTO and round trips. Default to 5s
        var timeoutMs = (this._rto * Transport.roundTrips) || 5000;
        this._transportTimeoutId = setTimeout(this._transportTimeout.bind(this), timeoutMs);
        debug('using timeout', timeoutMs);
    
        var transportUrl = urlUtils.addPath(this._transUrl, '/' + this._server + '/' + this._generateSessionId());
        var options = this._transportOptions[Transport.transportName];
        debug('transport url', transportUrl);
        var transportObj = new Transport(transportUrl, this._transUrl, options);
        transportObj.on('message', this._transportMessage.bind(this));
        transportObj.once('close', this._transportClose.bind(this));
        transportObj.transportName = Transport.transportName;
        this._transport = transportObj;
    
        return;
      }
      this._close(2000, 'All transports failed', false);
    };
    
    SockJS.prototype._transportTimeout = function() {
      debug('_transportTimeout');
      if (this.readyState === SockJS.CONNECTING) {
        this._transportClose(2007, 'Transport timed out');
      }
    };
    
    SockJS.prototype._transportMessage = function(msg) {
      debug('_transportMessage', msg);
      var self = this
        , type = msg.slice(0, 1)
        , content = msg.slice(1)
        , payload
        ;
    
      // first check for messages that don't need a payload
      switch (type) {
        case 'o':
          this._open();
          return;
        case 'h':
          this.dispatchEvent(new Event('heartbeat'));
          debug('heartbeat', this.transport);
          return;
      }
    
      if (content) {
        try {
          payload = JSON3.parse(content);
        } catch (e) {
          debug('bad json', content);
        }
      }
    
      if (typeof payload === 'undefined') {
        debug('empty payload', content);
        return;
      }
    
      switch (type) {
        case 'a':
          if (Array.isArray(payload)) {
            payload.forEach(function(p) {
              debug('message', self.transport, p);
              self.dispatchEvent(new TransportMessageEvent(p));
            });
          }
          break;
        case 'm':
          debug('message', this.transport, payload);
          this.dispatchEvent(new TransportMessageEvent(payload));
          break;
        case 'c':
          if (Array.isArray(payload) && payload.length === 2) {
            this._close(payload[0], payload[1], true);
          }
          break;
      }
    };
    
    SockJS.prototype._transportClose = function(code, reason) {
      debug('_transportClose', this.transport, code, reason);
      if (this._transport) {
        this._transport.removeAllListeners();
        this._transport = null;
        this.transport = null;
      }
    
      if (!userSetCode(code) && code !== 2000 && this.readyState === SockJS.CONNECTING) {
        this._connect();
        return;
      }
    
      this._close(code, reason);
    };
    
    SockJS.prototype._open = function() {
      debug('_open', this._transport.transportName, this.readyState);
      if (this.readyState === SockJS.CONNECTING) {
        if (this._transportTimeoutId) {
          clearTimeout(this._transportTimeoutId);
          this._transportTimeoutId = null;
        }
        this.readyState = SockJS.OPEN;
        this.transport = this._transport.transportName;
        this.dispatchEvent(new Event('open'));
        debug('connected', this.transport);
      } else {
        // The server might have been restarted, and lost track of our
        // connection.
        this._close(1006, 'Server lost session');
      }
    };
    
    SockJS.prototype._close = function(code, reason, wasClean) {
      debug('_close', this.transport, code, reason, wasClean, this.readyState);
      var forceFail = false;
    
      if (this._ir) {
        forceFail = true;
        this._ir.close();
        this._ir = null;
      }
      if (this._transport) {
        this._transport.close();
        this._transport = null;
        this.transport = null;
      }
    
      if (this.readyState === SockJS.CLOSED) {
        throw new Error('InvalidStateError: SockJS has already been closed');
      }
    
      this.readyState = SockJS.CLOSING;
      setTimeout(function() {
        this.readyState = SockJS.CLOSED;
    
        if (forceFail) {
          this.dispatchEvent(new Event('error'));
        }
    
        var e = new CloseEvent('close');
        e.wasClean = wasClean || false;
        e.code = code || 1000;
        e.reason = reason;
    
        this.dispatchEvent(e);
        this.onmessage = this.onclose = this.onerror = null;
        debug('disconnected');
      }.bind(this), 0);
    };
    
    // See: http://www.erg.abdn.ac.uk/~gerrit/dccp/notes/ccid2/rto_estimator/
    // and RFC 2988.
    SockJS.prototype.countRTO = function(rtt) {
      // In a local environment, when using IE8/9 and the `jsonp-polling`
      // transport the time needed to establish a connection (the time that pass
      // from the opening of the transport to the call of `_dispatchOpen`) is
      // around 200msec (the lower bound used in the article above) and this
      // causes spurious timeouts. For this reason we calculate a value slightly
      // larger than that used in the article.
      if (rtt > 100) {
        return 4 * rtt; // rto > 400msec
      }
      return 300 + rtt; // 300msec < rto <= 400msec
    };
    
    module.exports = function(availableTransports) {
      transports = transport(availableTransports);
      require('./iframe-bootstrap')(SockJS, availableTransports);
      return SockJS;
    };
    
    }).call(this,{ env: {} },typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
    
    },{"./event/close":2,"./event/event":4,"./event/eventtarget":5,"./event/trans-message":6,"./iframe-bootstrap":8,"./info-receiver":12,"./location":13,"./shims":15,"./utils/browser":44,"./utils/escape":45,"./utils/event":46,"./utils/log":48,"./utils/object":49,"./utils/random":50,"./utils/transport":51,"./utils/url":52,"./version":53,"debug":54,"inherits":56,"json3":57,"url-parse":61}],15:[function(require,module,exports){
    /* eslint-disable */
    /* jscs: disable */
    'use strict';
    
    // pulled specific shims from https://github.com/es-shims/es5-shim
    
    var ArrayPrototype = Array.prototype;
    var ObjectPrototype = Object.prototype;
    var FunctionPrototype = Function.prototype;
    var StringPrototype = String.prototype;
    var array_slice = ArrayPrototype.slice;
    
    var _toString = ObjectPrototype.toString;
    var isFunction = function (val) {
        return ObjectPrototype.toString.call(val) === '[object Function]';
    };
    var isArray = function isArray(obj) {
        return _toString.call(obj) === '[object Array]';
    };
    var isString = function isString(obj) {
        return _toString.call(obj) === '[object String]';
    };
    
    var supportsDescriptors = Object.defineProperty && (function () {
        try {
            Object.defineProperty({}, 'x', {});
            return true;
        } catch (e) { /* this is ES3 */
            return false;
        }
    }());
    
    // Define configurable, writable and non-enumerable props
    // if they don't exist.
    var defineProperty;
    if (supportsDescriptors) {
        defineProperty = function (object, name, method, forceAssign) {
            if (!forceAssign && (name in object)) { return; }
            Object.defineProperty(object, name, {
                configurable: true,
                enumerable: false,
                writable: true,
                value: method
            });
        };
    } else {
        defineProperty = function (object, name, method, forceAssign) {
            if (!forceAssign && (name in object)) { return; }
            object[name] = method;
        };
    }
    var defineProperties = function (object, map, forceAssign) {
        for (var name in map) {
            if (ObjectPrototype.hasOwnProperty.call(map, name)) {
              defineProperty(object, name, map[name], forceAssign);
            }
        }
    };
    
    var toObject = function (o) {
        if (o == null) { // this matches both null and undefined
            throw new TypeError("can't convert " + o + ' to object');
        }
        return Object(o);
    };
    
    //
    // Util
    // ======
    //
    
    // ES5 9.4
    // http://es5.github.com/#x9.4
    // http://jsperf.com/to-integer
    
    function toInteger(num) {
        var n = +num;
        if (n !== n) { // isNaN
            n = 0;
        } else if (n !== 0 && n !== (1 / 0) && n !== -(1 / 0)) {
            n = (n > 0 || -1) * Math.floor(Math.abs(n));
        }
        return n;
    }
    
    function ToUint32(x) {
        return x >>> 0;
    }
    
    //
    // Function
    // ========
    //
    
    // ES-5 15.3.4.5
    // http://es5.github.com/#x15.3.4.5
    
    function Empty() {}
    
    defineProperties(FunctionPrototype, {
        bind: function bind(that) { // .length is 1
            // 1. Let Target be the this value.
            var target = this;
            // 2. If IsCallable(Target) is false, throw a TypeError exception.
            if (!isFunction(target)) {
                throw new TypeError('Function.prototype.bind called on incompatible ' + target);
            }
            // 3. Let A be a new (possibly empty) internal list of all of the
            //   argument values provided after thisArg (arg1, arg2 etc), in order.
            // XXX slicedArgs will stand in for "A" if used
            var args = array_slice.call(arguments, 1); // for normal call
            // 4. Let F be a new native ECMAScript object.
            // 11. Set the [[Prototype]] internal property of F to the standard
            //   built-in Function prototype object as specified in 15.3.3.1.
            // 12. Set the [[Call]] internal property of F as described in
            //   15.3.4.5.1.
            // 13. Set the [[Construct]] internal property of F as described in
            //   15.3.4.5.2.
            // 14. Set the [[HasInstance]] internal property of F as described in
            //   15.3.4.5.3.
            var binder = function () {
    
                if (this instanceof bound) {
                    // 15.3.4.5.2 [[Construct]]
                    // When the [[Construct]] internal method of a function object,
                    // F that was created using the bind function is called with a
                    // list of arguments ExtraArgs, the following steps are taken:
                    // 1. Let target be the value of F's [[TargetFunction]]
                    //   internal property.
                    // 2. If target has no [[Construct]] internal method, a
                    //   TypeError exception is thrown.
                    // 3. Let boundArgs be the value of F's [[BoundArgs]] internal
                    //   property.
                    // 4. Let args be a new list containing the same values as the
                    //   list boundArgs in the same order followed by the same
                    //   values as the list ExtraArgs in the same order.
                    // 5. Return the result of calling the [[Construct]] internal
                    //   method of target providing args as the arguments.
    
                    var result = target.apply(
                        this,
                        args.concat(array_slice.call(arguments))
                    );
                    if (Object(result) === result) {
                        return result;
                    }
                    return this;
    
                } else {
                    // 15.3.4.5.1 [[Call]]
                    // When the [[Call]] internal method of a function object, F,
                    // which was created using the bind function is called with a
                    // this value and a list of arguments ExtraArgs, the following
                    // steps are taken:
                    // 1. Let boundArgs be the value of F's [[BoundArgs]] internal
                    //   property.
                    // 2. Let boundThis be the value of F's [[BoundThis]] internal
                    //   property.
                    // 3. Let target be the value of F's [[TargetFunction]] internal
                    //   property.
                    // 4. Let args be a new list containing the same values as the
                    //   list boundArgs in the same order followed by the same
                    //   values as the list ExtraArgs in the same order.
                    // 5. Return the result of calling the [[Call]] internal method
                    //   of target providing boundThis as the this value and
                    //   providing args as the arguments.
    
                    // equiv: target.call(this, ...boundArgs, ...args)
                    return target.apply(
                        that,
                        args.concat(array_slice.call(arguments))
                    );
    
                }
    
            };
    
            // 15. If the [[Class]] internal property of Target is "Function", then
            //     a. Let L be the length property of Target minus the length of A.
            //     b. Set the length own property of F to either 0 or L, whichever is
            //       larger.
            // 16. Else set the length own property of F to 0.
    
            var boundLength = Math.max(0, target.length - args.length);
    
            // 17. Set the attributes of the length own property of F to the values
            //   specified in 15.3.5.1.
            var boundArgs = [];
            for (var i = 0; i < boundLength; i++) {
                boundArgs.push('$' + i);
            }
    
            // XXX Build a dynamic function with desired amount of arguments is the only
            // way to set the length property of a function.
            // In environments where Content Security Policies enabled (Chrome extensions,
            // for ex.) all use of eval or Function costructor throws an exception.
            // However in all of these environments Function.prototype.bind exists
            // and so this code will never be executed.
            var bound = Function('binder', 'return function (' + boundArgs.join(',') + '){ return binder.apply(this, arguments); }')(binder);
    
            if (target.prototype) {
                Empty.prototype = target.prototype;
                bound.prototype = new Empty();
                // Clean up dangling references.
                Empty.prototype = null;
            }
    
            // TODO
            // 18. Set the [[Extensible]] internal property of F to true.
    
            // TODO
            // 19. Let thrower be the [[ThrowTypeError]] function Object (13.2.3).
            // 20. Call the [[DefineOwnProperty]] internal method of F with
            //   arguments "caller", PropertyDescriptor {[[Get]]: thrower, [[Set]]:
            //   thrower, [[Enumerable]]: false, [[Configurable]]: false}, and
            //   false.
            // 21. Call the [[DefineOwnProperty]] internal method of F with
            //   arguments "arguments", PropertyDescriptor {[[Get]]: thrower,
            //   [[Set]]: thrower, [[Enumerable]]: false, [[Configurable]]: false},
            //   and false.
    
            // TODO
            // NOTE Function objects created using Function.prototype.bind do not
            // have a prototype property or the [[Code]], [[FormalParameters]], and
            // [[Scope]] internal properties.
            // XXX can't delete prototype in pure-js.
    
            // 22. Return F.
            return bound;
        }
    });
    
    //
    // Array
    // =====
    //
    
    // ES5 15.4.3.2
    // http://es5.github.com/#x15.4.3.2
    // https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/isArray
    defineProperties(Array, { isArray: isArray });
    
    
    var boxedString = Object('a');
    var splitString = boxedString[0] !== 'a' || !(0 in boxedString);
    
    var properlyBoxesContext = function properlyBoxed(method) {
        // Check node 0.6.21 bug where third parameter is not boxed
        var properlyBoxesNonStrict = true;
        var properlyBoxesStrict = true;
        if (method) {
            method.call('foo', function (_, __, context) {
                if (typeof context !== 'object') { properlyBoxesNonStrict = false; }
            });
    
            method.call([1], function () {
                'use strict';
                properlyBoxesStrict = typeof this === 'string';
            }, 'x');
        }
        return !!method && properlyBoxesNonStrict && properlyBoxesStrict;
    };
    
    defineProperties(ArrayPrototype, {
        forEach: function forEach(fun /*, thisp*/) {
            var object = toObject(this),
                self = splitString && isString(this) ? this.split('') : object,
                thisp = arguments[1],
                i = -1,
                length = self.length >>> 0;
    
            // If no callback function or if callback is not a callable function
            if (!isFunction(fun)) {
                throw new TypeError(); // TODO message
            }
    
            while (++i < length) {
                if (i in self) {
                    // Invoke the callback function with call, passing arguments:
                    // context, property value, property key, thisArg object
                    // context
                    fun.call(thisp, self[i], i, object);
                }
            }
        }
    }, !properlyBoxesContext(ArrayPrototype.forEach));
    
    // ES5 15.4.4.14
    // http://es5.github.com/#x15.4.4.14
    // https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/indexOf
    var hasFirefox2IndexOfBug = Array.prototype.indexOf && [0, 1].indexOf(1, 2) !== -1;
    defineProperties(ArrayPrototype, {
        indexOf: function indexOf(sought /*, fromIndex */ ) {
            var self = splitString && isString(this) ? this.split('') : toObject(this),
                length = self.length >>> 0;
    
            if (!length) {
                return -1;
            }
    
            var i = 0;
            if (arguments.length > 1) {
                i = toInteger(arguments[1]);
            }
    
            // handle negative indices
            i = i >= 0 ? i : Math.max(0, length + i);
            for (; i < length; i++) {
                if (i in self && self[i] === sought) {
                    return i;
                }
            }
            return -1;
        }
    }, hasFirefox2IndexOfBug);
    
    //
    // String
    // ======
    //
    
    // ES5 15.5.4.14
    // http://es5.github.com/#x15.5.4.14
    
    // [bugfix, IE lt 9, firefox 4, Konqueror, Opera, obscure browsers]
    // Many browsers do not split properly with regular expressions or they
    // do not perform the split correctly under obscure conditions.
    // See http://blog.stevenlevithan.com/archives/cross-browser-split
    // I've tested in many browsers and this seems to cover the deviant ones:
    //    'ab'.split(/(?:ab)*/) should be ["", ""], not [""]
    //    '.'.split(/(.?)(.?)/) should be ["", ".", "", ""], not ["", ""]
    //    'tesst'.split(/(s)*/) should be ["t", undefined, "e", "s", "t"], not
    //       [undefined, "t", undefined, "e", ...]
    //    ''.split(/.?/) should be [], not [""]
    //    '.'.split(/()()/) should be ["."], not ["", "", "."]
    
    var string_split = StringPrototype.split;
    if (
        'ab'.split(/(?:ab)*/).length !== 2 ||
        '.'.split(/(.?)(.?)/).length !== 4 ||
        'tesst'.split(/(s)*/)[1] === 't' ||
        'test'.split(/(?:)/, -1).length !== 4 ||
        ''.split(/.?/).length ||
        '.'.split(/()()/).length > 1
    ) {
        (function () {
            var compliantExecNpcg = /()??/.exec('')[1] === void 0; // NPCG: nonparticipating capturing group
    
            StringPrototype.split = function (separator, limit) {
                var string = this;
                if (separator === void 0 && limit === 0) {
                    return [];
                }
    
                // If `separator` is not a regex, use native split
                if (_toString.call(separator) !== '[object RegExp]') {
                    return string_split.call(this, separator, limit);
                }
    
                var output = [],
                    flags = (separator.ignoreCase ? 'i' : '') +
                            (separator.multiline  ? 'm' : '') +
                            (separator.extended   ? 'x' : '') + // Proposed for ES6
                            (separator.sticky     ? 'y' : ''), // Firefox 3+
                    lastLastIndex = 0,
                    // Make `global` and avoid `lastIndex` issues by working with a copy
                    separator2, match, lastIndex, lastLength;
                separator = new RegExp(separator.source, flags + 'g');
                string += ''; // Type-convert
                if (!compliantExecNpcg) {
                    // Doesn't need flags gy, but they don't hurt
                    separator2 = new RegExp('^' + separator.source + '$(?!\\s)', flags);
                }
                /* Values for `limit`, per the spec:
                 * If undefined: 4294967295 // Math.pow(2, 32) - 1
                 * If 0, Infinity, or NaN: 0
                 * If positive number: limit = Math.floor(limit); if (limit > 4294967295) limit -= 4294967296;
                 * If negative number: 4294967296 - Math.floor(Math.abs(limit))
                 * If other: Type-convert, then use the above rules
                 */
                limit = limit === void 0 ?
                    -1 >>> 0 : // Math.pow(2, 32) - 1
                    ToUint32(limit);
                while (match = separator.exec(string)) {
                    // `separator.lastIndex` is not reliable cross-browser
                    lastIndex = match.index + match[0].length;
                    if (lastIndex > lastLastIndex) {
                        output.push(string.slice(lastLastIndex, match.index));
                        // Fix browsers whose `exec` methods don't consistently return `undefined` for
                        // nonparticipating capturing groups
                        if (!compliantExecNpcg && match.length > 1) {
                            match[0].replace(separator2, function () {
                                for (var i = 1; i < arguments.length - 2; i++) {
                                    if (arguments[i] === void 0) {
                                        match[i] = void 0;
                                    }
                                }
                            });
                        }
                        if (match.length > 1 && match.index < string.length) {
                            ArrayPrototype.push.apply(output, match.slice(1));
                        }
                        lastLength = match[0].length;
                        lastLastIndex = lastIndex;
                        if (output.length >= limit) {
                            break;
                        }
                    }
                    if (separator.lastIndex === match.index) {
                        separator.lastIndex++; // Avoid an infinite loop
                    }
                }
                if (lastLastIndex === string.length) {
                    if (lastLength || !separator.test('')) {
                        output.push('');
                    }
                } else {
                    output.push(string.slice(lastLastIndex));
                }
                return output.length > limit ? output.slice(0, limit) : output;
            };
        }());
    
    // [bugfix, chrome]
    // If separator is undefined, then the result array contains just one String,
    // which is the this value (converted to a String). If limit is not undefined,
    // then the output array is truncated so that it contains no more than limit
    // elements.
    // "0".split(undefined, 0) -> []
    } else if ('0'.split(void 0, 0).length) {
        StringPrototype.split = function split(separator, limit) {
            if (separator === void 0 && limit === 0) { return []; }
            return string_split.call(this, separator, limit);
        };
    }
    
    // ECMA-262, 3rd B.2.3
    // Not an ECMAScript standard, although ECMAScript 3rd Edition has a
    // non-normative section suggesting uniform semantics and it should be
    // normalized across all browsers
    // [bugfix, IE lt 9] IE < 9 substr() with negative value not working in IE
    var string_substr = StringPrototype.substr;
    var hasNegativeSubstrBug = ''.substr && '0b'.substr(-1) !== 'b';
    defineProperties(StringPrototype, {
        substr: function substr(start, length) {
            return string_substr.call(
                this,
                start < 0 ? ((start = this.length + start) < 0 ? 0 : start) : start,
                length
            );
        }
    }, hasNegativeSubstrBug);
    
    },{}],16:[function(require,module,exports){
    'use strict';
    
    module.exports = [
      // streaming transports
      require('./transport/websocket')
    , require('./transport/xhr-streaming')
    , require('./transport/xdr-streaming')
    , require('./transport/eventsource')
    , require('./transport/lib/iframe-wrap')(require('./transport/eventsource'))
    
      // polling transports
    , require('./transport/htmlfile')
    , require('./transport/lib/iframe-wrap')(require('./transport/htmlfile'))
    , require('./transport/xhr-polling')
    , require('./transport/xdr-polling')
    , require('./transport/lib/iframe-wrap')(require('./transport/xhr-polling'))
    , require('./transport/jsonp-polling')
    ];
    
    },{"./transport/eventsource":20,"./transport/htmlfile":21,"./transport/jsonp-polling":23,"./transport/lib/iframe-wrap":26,"./transport/websocket":38,"./transport/xdr-polling":39,"./transport/xdr-streaming":40,"./transport/xhr-polling":41,"./transport/xhr-streaming":42}],17:[function(require,module,exports){
    (function (process,global){
    'use strict';
    
    var EventEmitter = require('events').EventEmitter
      , inherits = require('inherits')
      , utils = require('../../utils/event')
      , urlUtils = require('../../utils/url')
      , XHR = global.XMLHttpRequest
      ;
    
    var debug = function() {};
    if (process.env.NODE_ENV !== 'production') {
      debug = require('debug')('sockjs-client:browser:xhr');
    }
    
    function AbstractXHRObject(method, url, payload, opts) {
      debug(method, url);
      var self = this;
      EventEmitter.call(this);
    
      setTimeout(function () {
        self._start(method, url, payload, opts);
      }, 0);
    }
    
    inherits(AbstractXHRObject, EventEmitter);
    
    AbstractXHRObject.prototype._start = function(method, url, payload, opts) {
      var self = this;
    
      try {
        this.xhr = new XHR();
      } catch (x) {
        // intentionally empty
      }
    
      if (!this.xhr) {
        debug('no xhr');
        this.emit('finish', 0, 'no xhr support');
        this._cleanup();
        return;
      }
    
      // several browsers cache POSTs
      url = urlUtils.addQuery(url, 't=' + (+new Date()));
    
      // Explorer tends to keep connection open, even after the
      // tab gets closed: http://bugs.jquery.com/ticket/5280
      this.unloadRef = utils.unloadAdd(function() {
        debug('unload cleanup');
        self._cleanup(true);
      });
      try {
        this.xhr.open(method, url, true);
        if (this.timeout && 'timeout' in this.xhr) {
          this.xhr.timeout = this.timeout;
          this.xhr.ontimeout = function() {
            debug('xhr timeout');
            self.emit('finish', 0, '');
            self._cleanup(false);
          };
        }
      } catch (e) {
        debug('exception', e);
        // IE raises an exception on wrong port.
        this.emit('finish', 0, '');
        this._cleanup(false);
        return;
      }
    
      if ((!opts || !opts.noCredentials) && AbstractXHRObject.supportsCORS) {
        debug('withCredentials');
        // Mozilla docs says https://developer.mozilla.org/en/XMLHttpRequest :
        // "This never affects same-site requests."
    
        this.xhr.withCredentials = 'true';
      }
      if (opts && opts.headers) {
        for (var key in opts.headers) {
          this.xhr.setRequestHeader(key, opts.headers[key]);
        }
      }
    
      this.xhr.onreadystatechange = function() {
        if (self.xhr) {
          var x = self.xhr;
          var text, status;
          debug('readyState', x.readyState);
          switch (x.readyState) {
          case 3:
            // IE doesn't like peeking into responseText or status
            // on Microsoft.XMLHTTP and readystate=3
            try {
              status = x.status;
              text = x.responseText;
            } catch (e) {
              // intentionally empty
            }
            debug('status', status);
            // IE returns 1223 for 204: http://bugs.jquery.com/ticket/1450
            if (status === 1223) {
              status = 204;
            }
    
            // IE does return readystate == 3 for 404 answers.
            if (status === 200 && text && text.length > 0) {
              debug('chunk');
              self.emit('chunk', status, text);
            }
            break;
          case 4:
            status = x.status;
            debug('status', status);
            // IE returns 1223 for 204: http://bugs.jquery.com/ticket/1450
            if (status === 1223) {
              status = 204;
            }
            // IE returns this for a bad port
            // http://msdn.microsoft.com/en-us/library/windows/desktop/aa383770(v=vs.85).aspx
            if (status === 12005 || status === 12029) {
              status = 0;
            }
    
            debug('finish', status, x.responseText);
            self.emit('finish', status, x.responseText);
            self._cleanup(false);
            break;
          }
        }
      };
    
      try {
        self.xhr.send(payload);
      } catch (e) {
        self.emit('finish', 0, '');
        self._cleanup(false);
      }
    };
    
    AbstractXHRObject.prototype._cleanup = function(abort) {
      debug('cleanup');
      if (!this.xhr) {
        return;
      }
      this.removeAllListeners();
      utils.unloadDel(this.unloadRef);
    
      // IE needs this field to be a function
      this.xhr.onreadystatechange = function() {};
      if (this.xhr.ontimeout) {
        this.xhr.ontimeout = null;
      }
    
      if (abort) {
        try {
          this.xhr.abort();
        } catch (x) {
          // intentionally empty
        }
      }
      this.unloadRef = this.xhr = null;
    };
    
    AbstractXHRObject.prototype.close = function() {
      debug('close');
      this._cleanup(true);
    };
    
    AbstractXHRObject.enabled = !!XHR;
    // override XMLHttpRequest for IE6/7
    // obfuscate to avoid firewalls
    var axo = ['Active'].concat('Object').join('X');
    if (!AbstractXHRObject.enabled && (axo in global)) {
      debug('overriding xmlhttprequest');
      XHR = function() {
        try {
          return new global[axo]('Microsoft.XMLHTTP');
        } catch (e) {
          return null;
        }
      };
      AbstractXHRObject.enabled = !!new XHR();
    }
    
    var cors = false;
    try {
      cors = 'withCredentials' in new XHR();
    } catch (ignored) {
      // intentionally empty
    }
    
    AbstractXHRObject.supportsCORS = cors;
    
    module.exports = AbstractXHRObject;
    
    }).call(this,{ env: {} },typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
    
    },{"../../utils/event":46,"../../utils/url":52,"debug":54,"events":3,"inherits":56}],18:[function(require,module,exports){
    (function (global){
    module.exports = global.EventSource;
    
    }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
    
    },{}],19:[function(require,module,exports){
    (function (global){
    'use strict';
    
    var Driver = global.WebSocket || global.MozWebSocket;
    if (Driver) {
        module.exports = function WebSocketBrowserDriver(url) {
            return new Driver(url);
        };
    } else {
        module.exports = undefined;
    }
    
    }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
    
    },{}],20:[function(require,module,exports){
    'use strict';
    
    var inherits = require('inherits')
      , AjaxBasedTransport = require('./lib/ajax-based')
      , EventSourceReceiver = require('./receiver/eventsource')
      , XHRCorsObject = require('./sender/xhr-cors')
      , EventSourceDriver = require('eventsource')
      ;
    
    function EventSourceTransport(transUrl) {
      if (!EventSourceTransport.enabled()) {
        throw new Error('Transport created when disabled');
      }
    
      AjaxBasedTransport.call(this, transUrl, '/eventsource', EventSourceReceiver, XHRCorsObject);
    }
    
    inherits(EventSourceTransport, AjaxBasedTransport);
    
    EventSourceTransport.enabled = function() {
      return !!EventSourceDriver;
    };
    
    EventSourceTransport.transportName = 'eventsource';
    EventSourceTransport.roundTrips = 2;
    
    module.exports = EventSourceTransport;
    
    },{"./lib/ajax-based":24,"./receiver/eventsource":29,"./sender/xhr-cors":35,"eventsource":18,"inherits":56}],21:[function(require,module,exports){
    'use strict';
    
    var inherits = require('inherits')
      , HtmlfileReceiver = require('./receiver/htmlfile')
      , XHRLocalObject = require('./sender/xhr-local')
      , AjaxBasedTransport = require('./lib/ajax-based')
      ;
    
    function HtmlFileTransport(transUrl) {
      if (!HtmlfileReceiver.enabled) {
        throw new Error('Transport created when disabled');
      }
      AjaxBasedTransport.call(this, transUrl, '/htmlfile', HtmlfileReceiver, XHRLocalObject);
    }
    
    inherits(HtmlFileTransport, AjaxBasedTransport);
    
    HtmlFileTransport.enabled = function(info) {
      return HtmlfileReceiver.enabled && info.sameOrigin;
    };
    
    HtmlFileTransport.transportName = 'htmlfile';
    HtmlFileTransport.roundTrips = 2;
    
    module.exports = HtmlFileTransport;
    
    },{"./lib/ajax-based":24,"./receiver/htmlfile":30,"./sender/xhr-local":37,"inherits":56}],22:[function(require,module,exports){
    (function (process){
    'use strict';
    
    // Few cool transports do work only for same-origin. In order to make
    // them work cross-domain we shall use iframe, served from the
    // remote domain. New browsers have capabilities to communicate with
    // cross domain iframe using postMessage(). In IE it was implemented
    // from IE 8+, but of course, IE got some details wrong:
    //    http://msdn.microsoft.com/en-us/library/cc197015(v=VS.85).aspx
    //    http://stevesouders.com/misc/test-postmessage.php
    
    var inherits = require('inherits')
      , JSON3 = require('json3')
      , EventEmitter = require('events').EventEmitter
      , version = require('../version')
      , urlUtils = require('../utils/url')
      , iframeUtils = require('../utils/iframe')
      , eventUtils = require('../utils/event')
      , random = require('../utils/random')
      ;
    
    var debug = function() {};
    if (process.env.NODE_ENV !== 'production') {
      debug = require('debug')('sockjs-client:transport:iframe');
    }
    
    function IframeTransport(transport, transUrl, baseUrl) {
      if (!IframeTransport.enabled()) {
        throw new Error('Transport created when disabled');
      }
      EventEmitter.call(this);
    
      var self = this;
      this.origin = urlUtils.getOrigin(baseUrl);
      this.baseUrl = baseUrl;
      this.transUrl = transUrl;
      this.transport = transport;
      this.windowId = random.string(8);
    
      var iframeUrl = urlUtils.addPath(baseUrl, '/iframe.html') + '#' + this.windowId;
      debug(transport, transUrl, iframeUrl);
    
      this.iframeObj = iframeUtils.createIframe(iframeUrl, function(r) {
        debug('err callback');
        self.emit('close', 1006, 'Unable to load an iframe (' + r + ')');
        self.close();
      });
    
      this.onmessageCallback = this._message.bind(this);
      eventUtils.attachEvent('message', this.onmessageCallback);
    }
    
    inherits(IframeTransport, EventEmitter);
    
    IframeTransport.prototype.close = function() {
      debug('close');
      this.removeAllListeners();
      if (this.iframeObj) {
        eventUtils.detachEvent('message', this.onmessageCallback);
        try {
          // When the iframe is not loaded, IE raises an exception
          // on 'contentWindow'.
          this.postMessage('c');
        } catch (x) {
          // intentionally empty
        }
        this.iframeObj.cleanup();
        this.iframeObj = null;
        this.onmessageCallback = this.iframeObj = null;
      }
    };
    
    IframeTransport.prototype._message = function(e) {
      debug('message', e.data);
      if (!urlUtils.isOriginEqual(e.origin, this.origin)) {
        debug('not same origin', e.origin, this.origin);
        return;
      }
    
      var iframeMessage;
      try {
        iframeMessage = JSON3.parse(e.data);
      } catch (ignored) {
        debug('bad json', e.data);
        return;
      }
    
      if (iframeMessage.windowId !== this.windowId) {
        debug('mismatched window id', iframeMessage.windowId, this.windowId);
        return;
      }
    
      switch (iframeMessage.type) {
      case 's':
        this.iframeObj.loaded();
        // window global dependency
        this.postMessage('s', JSON3.stringify([
          version
        , this.transport
        , this.transUrl
        , this.baseUrl
        ]));
        break;
      case 't':
        this.emit('message', iframeMessage.data);
        break;
      case 'c':
        var cdata;
        try {
          cdata = JSON3.parse(iframeMessage.data);
        } catch (ignored) {
          debug('bad json', iframeMessage.data);
          return;
        }
        this.emit('close', cdata[0], cdata[1]);
        this.close();
        break;
      }
    };
    
    IframeTransport.prototype.postMessage = function(type, data) {
      debug('postMessage', type, data);
      this.iframeObj.post(JSON3.stringify({
        windowId: this.windowId
      , type: type
      , data: data || ''
      }), this.origin);
    };
    
    IframeTransport.prototype.send = function(message) {
      debug('send', message);
      this.postMessage('m', message);
    };
    
    IframeTransport.enabled = function() {
      return iframeUtils.iframeEnabled;
    };
    
    IframeTransport.transportName = 'iframe';
    IframeTransport.roundTrips = 2;
    
    module.exports = IframeTransport;
    
    }).call(this,{ env: {} })
    
    },{"../utils/event":46,"../utils/iframe":47,"../utils/random":50,"../utils/url":52,"../version":53,"debug":54,"events":3,"inherits":56,"json3":57}],23:[function(require,module,exports){
    (function (global){
    'use strict';
    
    // The simplest and most robust transport, using the well-know cross
    // domain hack - JSONP. This transport is quite inefficient - one
    // message could use up to one http request. But at least it works almost
    // everywhere.
    // Known limitations:
    //   o you will get a spinning cursor
    //   o for Konqueror a dumb timer is needed to detect errors
    
    var inherits = require('inherits')
      , SenderReceiver = require('./lib/sender-receiver')
      , JsonpReceiver = require('./receiver/jsonp')
      , jsonpSender = require('./sender/jsonp')
      ;
    
    function JsonPTransport(transUrl) {
      if (!JsonPTransport.enabled()) {
        throw new Error('Transport created when disabled');
      }
      SenderReceiver.call(this, transUrl, '/jsonp', jsonpSender, JsonpReceiver);
    }
    
    inherits(JsonPTransport, SenderReceiver);
    
    JsonPTransport.enabled = function() {
      return !!global.document;
    };
    
    JsonPTransport.transportName = 'jsonp-polling';
    JsonPTransport.roundTrips = 1;
    JsonPTransport.needBody = true;
    
    module.exports = JsonPTransport;
    
    }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
    
    },{"./lib/sender-receiver":28,"./receiver/jsonp":31,"./sender/jsonp":33,"inherits":56}],24:[function(require,module,exports){
    (function (process){
    'use strict';
    
    var inherits = require('inherits')
      , urlUtils = require('../../utils/url')
      , SenderReceiver = require('./sender-receiver')
      ;
    
    var debug = function() {};
    if (process.env.NODE_ENV !== 'production') {
      debug = require('debug')('sockjs-client:ajax-based');
    }
    
    function createAjaxSender(AjaxObject) {
      return function(url, payload, callback) {
        debug('create ajax sender', url, payload);
        var opt = {};
        if (typeof payload === 'string') {
          opt.headers = {'Content-type': 'text/plain'};
        }
        var ajaxUrl = urlUtils.addPath(url, '/xhr_send');
        var xo = new AjaxObject('POST', ajaxUrl, payload, opt);
        xo.once('finish', function(status) {
          debug('finish', status);
          xo = null;
    
          if (status !== 200 && status !== 204) {
            return callback(new Error('http status ' + status));
          }
          callback();
        });
        return function() {
          debug('abort');
          xo.close();
          xo = null;
    
          var err = new Error('Aborted');
          err.code = 1000;
          callback(err);
        };
      };
    }
    
    function AjaxBasedTransport(transUrl, urlSuffix, Receiver, AjaxObject) {
      SenderReceiver.call(this, transUrl, urlSuffix, createAjaxSender(AjaxObject), Receiver, AjaxObject);
    }
    
    inherits(AjaxBasedTransport, SenderReceiver);
    
    module.exports = AjaxBasedTransport;
    
    }).call(this,{ env: {} })
    
    },{"../../utils/url":52,"./sender-receiver":28,"debug":54,"inherits":56}],25:[function(require,module,exports){
    (function (process){
    'use strict';
    
    var inherits = require('inherits')
      , EventEmitter = require('events').EventEmitter
      ;
    
    var debug = function() {};
    if (process.env.NODE_ENV !== 'production') {
      debug = require('debug')('sockjs-client:buffered-sender');
    }
    
    function BufferedSender(url, sender) {
      debug(url);
      EventEmitter.call(this);
      this.sendBuffer = [];
      this.sender = sender;
      this.url = url;
    }
    
    inherits(BufferedSender, EventEmitter);
    
    BufferedSender.prototype.send = function(message) {
      debug('send', message);
      this.sendBuffer.push(message);
      if (!this.sendStop) {
        this.sendSchedule();
      }
    };
    
    // For polling transports in a situation when in the message callback,
    // new message is being send. If the sending connection was started
    // before receiving one, it is possible to saturate the network and
    // timeout due to the lack of receiving socket. To avoid that we delay
    // sending messages by some small time, in order to let receiving
    // connection be started beforehand. This is only a halfmeasure and
    // does not fix the big problem, but it does make the tests go more
    // stable on slow networks.
    BufferedSender.prototype.sendScheduleWait = function() {
      debug('sendScheduleWait');
      var self = this;
      var tref;
      this.sendStop = function() {
        debug('sendStop');
        self.sendStop = null;
        clearTimeout(tref);
      };
      tref = setTimeout(function() {
        debug('timeout');
        self.sendStop = null;
        self.sendSchedule();
      }, 25);
    };
    
    BufferedSender.prototype.sendSchedule = function() {
      debug('sendSchedule', this.sendBuffer.length);
      var self = this;
      if (this.sendBuffer.length > 0) {
        var payload = '[' + this.sendBuffer.join(',') + ']';
        this.sendStop = this.sender(this.url, payload, function(err) {
          self.sendStop = null;
          if (err) {
            debug('error', err);
            self.emit('close', err.code || 1006, 'Sending error: ' + err);
            self.close();
          } else {
            self.sendScheduleWait();
          }
        });
        this.sendBuffer = [];
      }
    };
    
    BufferedSender.prototype._cleanup = function() {
      debug('_cleanup');
      this.removeAllListeners();
    };
    
    BufferedSender.prototype.close = function() {
      debug('close');
      this._cleanup();
      if (this.sendStop) {
        this.sendStop();
        this.sendStop = null;
      }
    };
    
    module.exports = BufferedSender;
    
    }).call(this,{ env: {} })
    
    },{"debug":54,"events":3,"inherits":56}],26:[function(require,module,exports){
    (function (global){
    'use strict';
    
    var inherits = require('inherits')
      , IframeTransport = require('../iframe')
      , objectUtils = require('../../utils/object')
      ;
    
    module.exports = function(transport) {
    
      function IframeWrapTransport(transUrl, baseUrl) {
        IframeTransport.call(this, transport.transportName, transUrl, baseUrl);
      }
    
      inherits(IframeWrapTransport, IframeTransport);
    
      IframeWrapTransport.enabled = function(url, info) {
        if (!global.document) {
          return false;
        }
    
        var iframeInfo = objectUtils.extend({}, info);
        iframeInfo.sameOrigin = true;
        return transport.enabled(iframeInfo) && IframeTransport.enabled();
      };
    
      IframeWrapTransport.transportName = 'iframe-' + transport.transportName;
      IframeWrapTransport.needBody = true;
      IframeWrapTransport.roundTrips = IframeTransport.roundTrips + transport.roundTrips - 1; // html, javascript (2) + transport - no CORS (1)
    
      IframeWrapTransport.facadeTransport = transport;
    
      return IframeWrapTransport;
    };
    
    }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
    
    },{"../../utils/object":49,"../iframe":22,"inherits":56}],27:[function(require,module,exports){
    (function (process){
    'use strict';
    
    var inherits = require('inherits')
      , EventEmitter = require('events').EventEmitter
      ;
    
    var debug = function() {};
    if (process.env.NODE_ENV !== 'production') {
      debug = require('debug')('sockjs-client:polling');
    }
    
    function Polling(Receiver, receiveUrl, AjaxObject) {
      debug(receiveUrl);
      EventEmitter.call(this);
      this.Receiver = Receiver;
      this.receiveUrl = receiveUrl;
      this.AjaxObject = AjaxObject;
      this._scheduleReceiver();
    }
    
    inherits(Polling, EventEmitter);
    
    Polling.prototype._scheduleReceiver = function() {
      debug('_scheduleReceiver');
      var self = this;
      var poll = this.poll = new this.Receiver(this.receiveUrl, this.AjaxObject);
    
      poll.on('message', function(msg) {
        debug('message', msg);
        self.emit('message', msg);
      });
    
      poll.once('close', function(code, reason) {
        debug('close', code, reason, self.pollIsClosing);
        self.poll = poll = null;
    
        if (!self.pollIsClosing) {
          if (reason === 'network') {
            self._scheduleReceiver();
          } else {
            self.emit('close', code || 1006, reason);
            self.removeAllListeners();
          }
        }
      });
    };
    
    Polling.prototype.abort = function() {
      debug('abort');
      this.removeAllListeners();
      this.pollIsClosing = true;
      if (this.poll) {
        this.poll.abort();
      }
    };
    
    module.exports = Polling;
    
    }).call(this,{ env: {} })
    
    },{"debug":54,"events":3,"inherits":56}],28:[function(require,module,exports){
    (function (process){
    'use strict';
    
    var inherits = require('inherits')
      , urlUtils = require('../../utils/url')
      , BufferedSender = require('./buffered-sender')
      , Polling = require('./polling')
      ;
    
    var debug = function() {};
    if (process.env.NODE_ENV !== 'production') {
      debug = require('debug')('sockjs-client:sender-receiver');
    }
    
    function SenderReceiver(transUrl, urlSuffix, senderFunc, Receiver, AjaxObject) {
      var pollUrl = urlUtils.addPath(transUrl, urlSuffix);
      debug(pollUrl);
      var self = this;
      BufferedSender.call(this, transUrl, senderFunc);
    
      this.poll = new Polling(Receiver, pollUrl, AjaxObject);
      this.poll.on('message', function(msg) {
        debug('poll message', msg);
        self.emit('message', msg);
      });
      this.poll.once('close', function(code, reason) {
        debug('poll close', code, reason);
        self.poll = null;
        self.emit('close', code, reason);
        self.close();
      });
    }
    
    inherits(SenderReceiver, BufferedSender);
    
    SenderReceiver.prototype.close = function() {
      BufferedSender.prototype.close.call(this);
      debug('close');
      this.removeAllListeners();
      if (this.poll) {
        this.poll.abort();
        this.poll = null;
      }
    };
    
    module.exports = SenderReceiver;
    
    }).call(this,{ env: {} })
    
    },{"../../utils/url":52,"./buffered-sender":25,"./polling":27,"debug":54,"inherits":56}],29:[function(require,module,exports){
    (function (process){
    'use strict';
    
    var inherits = require('inherits')
      , EventEmitter = require('events').EventEmitter
      , EventSourceDriver = require('eventsource')
      ;
    
    var debug = function() {};
    if (process.env.NODE_ENV !== 'production') {
      debug = require('debug')('sockjs-client:receiver:eventsource');
    }
    
    function EventSourceReceiver(url) {
      debug(url);
      EventEmitter.call(this);
    
      var self = this;
      var es = this.es = new EventSourceDriver(url);
      es.onmessage = function(e) {
        debug('message', e.data);
        self.emit('message', decodeURI(e.data));
      };
      es.onerror = function(e) {
        debug('error', es.readyState, e);
        // ES on reconnection has readyState = 0 or 1.
        // on network error it's CLOSED = 2
        var reason = (es.readyState !== 2 ? 'network' : 'permanent');
        self._cleanup();
        self._close(reason);
      };
    }
    
    inherits(EventSourceReceiver, EventEmitter);
    
    EventSourceReceiver.prototype.abort = function() {
      debug('abort');
      this._cleanup();
      this._close('user');
    };
    
    EventSourceReceiver.prototype._cleanup = function() {
      debug('cleanup');
      var es = this.es;
      if (es) {
        es.onmessage = es.onerror = null;
        es.close();
        this.es = null;
      }
    };
    
    EventSourceReceiver.prototype._close = function(reason) {
      debug('close', reason);
      var self = this;
      // Safari and chrome < 15 crash if we close window before
      // waiting for ES cleanup. See:
      // https://code.google.com/p/chromium/issues/detail?id=89155
      setTimeout(function() {
        self.emit('close', null, reason);
        self.removeAllListeners();
      }, 200);
    };
    
    module.exports = EventSourceReceiver;
    
    }).call(this,{ env: {} })
    
    },{"debug":54,"events":3,"eventsource":18,"inherits":56}],30:[function(require,module,exports){
    (function (process,global){
    'use strict';
    
    var inherits = require('inherits')
      , iframeUtils = require('../../utils/iframe')
      , urlUtils = require('../../utils/url')
      , EventEmitter = require('events').EventEmitter
      , random = require('../../utils/random')
      ;
    
    var debug = function() {};
    if (process.env.NODE_ENV !== 'production') {
      debug = require('debug')('sockjs-client:receiver:htmlfile');
    }
    
    function HtmlfileReceiver(url) {
      debug(url);
      EventEmitter.call(this);
      var self = this;
      iframeUtils.polluteGlobalNamespace();
    
      this.id = 'a' + random.string(6);
      url = urlUtils.addQuery(url, 'c=' + decodeURIComponent(iframeUtils.WPrefix + '.' + this.id));
    
      debug('using htmlfile', HtmlfileReceiver.htmlfileEnabled);
      var constructFunc = HtmlfileReceiver.htmlfileEnabled ?
          iframeUtils.createHtmlfile : iframeUtils.createIframe;
    
      global[iframeUtils.WPrefix][this.id] = {
        start: function() {
          debug('start');
          self.iframeObj.loaded();
        }
      , message: function(data) {
          debug('message', data);
          self.emit('message', data);
        }
      , stop: function() {
          debug('stop');
          self._cleanup();
          self._close('network');
        }
      };
      this.iframeObj = constructFunc(url, function() {
        debug('callback');
        self._cleanup();
        self._close('permanent');
      });
    }
    
    inherits(HtmlfileReceiver, EventEmitter);
    
    HtmlfileReceiver.prototype.abort = function() {
      debug('abort');
      this._cleanup();
      this._close('user');
    };
    
    HtmlfileReceiver.prototype._cleanup = function() {
      debug('_cleanup');
      if (this.iframeObj) {
        this.iframeObj.cleanup();
        this.iframeObj = null;
      }
      delete global[iframeUtils.WPrefix][this.id];
    };
    
    HtmlfileReceiver.prototype._close = function(reason) {
      debug('_close', reason);
      this.emit('close', null, reason);
      this.removeAllListeners();
    };
    
    HtmlfileReceiver.htmlfileEnabled = false;
    
    // obfuscate to avoid firewalls
    var axo = ['Active'].concat('Object').join('X');
    if (axo in global) {
      try {
        HtmlfileReceiver.htmlfileEnabled = !!new global[axo]('htmlfile');
      } catch (x) {
        // intentionally empty
      }
    }
    
    HtmlfileReceiver.enabled = HtmlfileReceiver.htmlfileEnabled || iframeUtils.iframeEnabled;
    
    module.exports = HtmlfileReceiver;
    
    }).call(this,{ env: {} },typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
    
    },{"../../utils/iframe":47,"../../utils/random":50,"../../utils/url":52,"debug":54,"events":3,"inherits":56}],31:[function(require,module,exports){
    (function (process,global){
    'use strict';
    
    var utils = require('../../utils/iframe')
      , random = require('../../utils/random')
      , browser = require('../../utils/browser')
      , urlUtils = require('../../utils/url')
      , inherits = require('inherits')
      , EventEmitter = require('events').EventEmitter
      ;
    
    var debug = function() {};
    if (process.env.NODE_ENV !== 'production') {
      debug = require('debug')('sockjs-client:receiver:jsonp');
    }
    
    function JsonpReceiver(url) {
      debug(url);
      var self = this;
      EventEmitter.call(this);
    
      utils.polluteGlobalNamespace();
    
      this.id = 'a' + random.string(6);
      var urlWithId = urlUtils.addQuery(url, 'c=' + encodeURIComponent(utils.WPrefix + '.' + this.id));
    
      global[utils.WPrefix][this.id] = this._callback.bind(this);
      this._createScript(urlWithId);
    
      // Fallback mostly for Konqueror - stupid timer, 35 seconds shall be plenty.
      this.timeoutId = setTimeout(function() {
        debug('timeout');
        self._abort(new Error('JSONP script loaded abnormally (timeout)'));
      }, JsonpReceiver.timeout);
    }
    
    inherits(JsonpReceiver, EventEmitter);
    
    JsonpReceiver.prototype.abort = function() {
      debug('abort');
      if (global[utils.WPrefix][this.id]) {
        var err = new Error('JSONP user aborted read');
        err.code = 1000;
        this._abort(err);
      }
    };
    
    JsonpReceiver.timeout = 35000;
    JsonpReceiver.scriptErrorTimeout = 1000;
    
    JsonpReceiver.prototype._callback = function(data) {
      debug('_callback', data);
      this._cleanup();
    
      if (this.aborting) {
        return;
      }
    
      if (data) {
        debug('message', data);
        this.emit('message', data);
      }
      this.emit('close', null, 'network');
      this.removeAllListeners();
    };
    
    JsonpReceiver.prototype._abort = function(err) {
      debug('_abort', err);
      this._cleanup();
      this.aborting = true;
      this.emit('close', err.code, err.message);
      this.removeAllListeners();
    };
    
    JsonpReceiver.prototype._cleanup = function() {
      debug('_cleanup');
      clearTimeout(this.timeoutId);
      if (this.script2) {
        this.script2.parentNode.removeChild(this.script2);
        this.script2 = null;
      }
      if (this.script) {
        var script = this.script;
        // Unfortunately, you can't really abort script loading of
        // the script.
        script.parentNode.removeChild(script);
        script.onreadystatechange = script.onerror =
            script.onload = script.onclick = null;
        this.script = null;
      }
      delete global[utils.WPrefix][this.id];
    };
    
    JsonpReceiver.prototype._scriptError = function() {
      debug('_scriptError');
      var self = this;
      if (this.errorTimer) {
        return;
      }
    
      this.errorTimer = setTimeout(function() {
        if (!self.loadedOkay) {
          self._abort(new Error('JSONP script loaded abnormally (onerror)'));
        }
      }, JsonpReceiver.scriptErrorTimeout);
    };
    
    JsonpReceiver.prototype._createScript = function(url) {
      debug('_createScript', url);
      var self = this;
      var script = this.script = global.document.createElement('script');
      var script2;  // Opera synchronous load trick.
    
      script.id = 'a' + random.string(8);
      script.src = url;
      script.type = 'text/javascript';
      script.charset = 'UTF-8';
      script.onerror = this._scriptError.bind(this);
      script.onload = function() {
        debug('onload');
        self._abort(new Error('JSONP script loaded abnormally (onload)'));
      };
    
      // IE9 fires 'error' event after onreadystatechange or before, in random order.
      // Use loadedOkay to determine if actually errored
      script.onreadystatechange = function() {
        debug('onreadystatechange', script.readyState);
        if (/loaded|closed/.test(script.readyState)) {
          if (script && script.htmlFor && script.onclick) {
            self.loadedOkay = true;
            try {
              // In IE, actually execute the script.
              script.onclick();
            } catch (x) {
              // intentionally empty
            }
          }
          if (script) {
            self._abort(new Error('JSONP script loaded abnormally (onreadystatechange)'));
          }
        }
      };
      // IE: event/htmlFor/onclick trick.
      // One can't rely on proper order for onreadystatechange. In order to
      // make sure, set a 'htmlFor' and 'event' properties, so that
      // script code will be installed as 'onclick' handler for the
      // script object. Later, onreadystatechange, manually execute this
      // code. FF and Chrome doesn't work with 'event' and 'htmlFor'
      // set. For reference see:
      //   http://jaubourg.net/2010/07/loading-script-as-onclick-handler-of.html
      // Also, read on that about script ordering:
      //   http://wiki.whatwg.org/wiki/Dynamic_Script_Execution_Order
      if (typeof script.async === 'undefined' && global.document.attachEvent) {
        // According to mozilla docs, in recent browsers script.async defaults
        // to 'true', so we may use it to detect a good browser:
        // https://developer.mozilla.org/en/HTML/Element/script
        if (!browser.isOpera()) {
          // Naively assume we're in IE
          try {
            script.htmlFor = script.id;
            script.event = 'onclick';
          } catch (x) {
            // intentionally empty
          }
          script.async = true;
        } else {
          // Opera, second sync script hack
          script2 = this.script2 = global.document.createElement('script');
          script2.text = "try{var a = document.getElementById('" + script.id + "'); if(a)a.onerror();}catch(x){};";
          script.async = script2.async = false;
        }
      }
      if (typeof script.async !== 'undefined') {
        script.async = true;
      }
    
      var head = global.document.getElementsByTagName('head')[0];
      head.insertBefore(script, head.firstChild);
      if (script2) {
        head.insertBefore(script2, head.firstChild);
      }
    };
    
    module.exports = JsonpReceiver;
    
    }).call(this,{ env: {} },typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
    
    },{"../../utils/browser":44,"../../utils/iframe":47,"../../utils/random":50,"../../utils/url":52,"debug":54,"events":3,"inherits":56}],32:[function(require,module,exports){
    (function (process){
    'use strict';
    
    var inherits = require('inherits')
      , EventEmitter = require('events').EventEmitter
      ;
    
    var debug = function() {};
    if (process.env.NODE_ENV !== 'production') {
      debug = require('debug')('sockjs-client:receiver:xhr');
    }
    
    function XhrReceiver(url, AjaxObject) {
      debug(url);
      EventEmitter.call(this);
      var self = this;
    
      this.bufferPosition = 0;
    
      this.xo = new AjaxObject('POST', url, null);
      this.xo.on('chunk', this._chunkHandler.bind(this));
      this.xo.once('finish', function(status, text) {
        debug('finish', status, text);
        self._chunkHandler(status, text);
        self.xo = null;
        var reason = status === 200 ? 'network' : 'permanent';
        debug('close', reason);
        self.emit('close', null, reason);
        self._cleanup();
      });
    }
    
    inherits(XhrReceiver, EventEmitter);
    
    XhrReceiver.prototype._chunkHandler = function(status, text) {
      debug('_chunkHandler', status);
      if (status !== 200 || !text) {
        return;
      }
    
      for (var idx = -1; ; this.bufferPosition += idx + 1) {
        var buf = text.slice(this.bufferPosition);
        idx = buf.indexOf('\n');
        if (idx === -1) {
          break;
        }
        var msg = buf.slice(0, idx);
        if (msg) {
          debug('message', msg);
          this.emit('message', msg);
        }
      }
    };
    
    XhrReceiver.prototype._cleanup = function() {
      debug('_cleanup');
      this.removeAllListeners();
    };
    
    XhrReceiver.prototype.abort = function() {
      debug('abort');
      if (this.xo) {
        this.xo.close();
        debug('close');
        this.emit('close', null, 'user');
        this.xo = null;
      }
      this._cleanup();
    };
    
    module.exports = XhrReceiver;
    
    }).call(this,{ env: {} })
    
    },{"debug":54,"events":3,"inherits":56}],33:[function(require,module,exports){
    (function (process,global){
    'use strict';
    
    var random = require('../../utils/random')
      , urlUtils = require('../../utils/url')
      ;
    
    var debug = function() {};
    if (process.env.NODE_ENV !== 'production') {
      debug = require('debug')('sockjs-client:sender:jsonp');
    }
    
    var form, area;
    
    function createIframe(id) {
      debug('createIframe', id);
      try {
        // ie6 dynamic iframes with target="" support (thanks Chris Lambacher)
        return global.document.createElement('<iframe name="' + id + '">');
      } catch (x) {
        var iframe = global.document.createElement('iframe');
        iframe.name = id;
        return iframe;
      }
    }
    
    function createForm() {
      debug('createForm');
      form = global.document.createElement('form');
      form.style.display = 'none';
      form.style.position = 'absolute';
      form.method = 'POST';
      form.enctype = 'application/x-www-form-urlencoded';
      form.acceptCharset = 'UTF-8';
    
      area = global.document.createElement('textarea');
      area.name = 'd';
      form.appendChild(area);
    
      global.document.body.appendChild(form);
    }
    
    module.exports = function(url, payload, callback) {
      debug(url, payload);
      if (!form) {
        createForm();
      }
      var id = 'a' + random.string(8);
      form.target = id;
      form.action = urlUtils.addQuery(urlUtils.addPath(url, '/jsonp_send'), 'i=' + id);
    
      var iframe = createIframe(id);
      iframe.id = id;
      iframe.style.display = 'none';
      form.appendChild(iframe);
    
      try {
        area.value = payload;
      } catch (e) {
        // seriously broken browsers get here
      }
      form.submit();
    
      var completed = function(err) {
        debug('completed', id, err);
        if (!iframe.onerror) {
          return;
        }
        iframe.onreadystatechange = iframe.onerror = iframe.onload = null;
        // Opera mini doesn't like if we GC iframe
        // immediately, thus this timeout.
        setTimeout(function() {
          debug('cleaning up', id);
          iframe.parentNode.removeChild(iframe);
          iframe = null;
        }, 500);
        area.value = '';
        // It is not possible to detect if the iframe succeeded or
        // failed to submit our form.
        callback(err);
      };
      iframe.onerror = function() {
        debug('onerror', id);
        completed();
      };
      iframe.onload = function() {
        debug('onload', id);
        completed();
      };
      iframe.onreadystatechange = function(e) {
        debug('onreadystatechange', id, iframe.readyState, e);
        if (iframe.readyState === 'complete') {
          completed();
        }
      };
      return function() {
        debug('aborted', id);
        completed(new Error('Aborted'));
      };
    };
    
    }).call(this,{ env: {} },typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
    
    },{"../../utils/random":50,"../../utils/url":52,"debug":54}],34:[function(require,module,exports){
    (function (process,global){
    'use strict';
    
    var EventEmitter = require('events').EventEmitter
      , inherits = require('inherits')
      , eventUtils = require('../../utils/event')
      , browser = require('../../utils/browser')
      , urlUtils = require('../../utils/url')
      ;
    
    var debug = function() {};
    if (process.env.NODE_ENV !== 'production') {
      debug = require('debug')('sockjs-client:sender:xdr');
    }
    
    // References:
    //   http://ajaxian.com/archives/100-line-ajax-wrapper
    //   http://msdn.microsoft.com/en-us/library/cc288060(v=VS.85).aspx
    
    function XDRObject(method, url, payload) {
      debug(method, url);
      var self = this;
      EventEmitter.call(this);
    
      setTimeout(function() {
        self._start(method, url, payload);
      }, 0);
    }
    
    inherits(XDRObject, EventEmitter);
    
    XDRObject.prototype._start = function(method, url, payload) {
      debug('_start');
      var self = this;
      var xdr = new global.XDomainRequest();
      // IE caches even POSTs
      url = urlUtils.addQuery(url, 't=' + (+new Date()));
    
      xdr.onerror = function() {
        debug('onerror');
        self._error();
      };
      xdr.ontimeout = function() {
        debug('ontimeout');
        self._error();
      };
      xdr.onprogress = function() {
        debug('progress', xdr.responseText);
        self.emit('chunk', 200, xdr.responseText);
      };
      xdr.onload = function() {
        debug('load');
        self.emit('finish', 200, xdr.responseText);
        self._cleanup(false);
      };
      this.xdr = xdr;
      this.unloadRef = eventUtils.unloadAdd(function() {
        self._cleanup(true);
      });
      try {
        // Fails with AccessDenied if port number is bogus
        this.xdr.open(method, url);
        if (this.timeout) {
          this.xdr.timeout = this.timeout;
        }
        this.xdr.send(payload);
      } catch (x) {
        this._error();
      }
    };
    
    XDRObject.prototype._error = function() {
      this.emit('finish', 0, '');
      this._cleanup(false);
    };
    
    XDRObject.prototype._cleanup = function(abort) {
      debug('cleanup', abort);
      if (!this.xdr) {
        return;
      }
      this.removeAllListeners();
      eventUtils.unloadDel(this.unloadRef);
    
      this.xdr.ontimeout = this.xdr.onerror = this.xdr.onprogress = this.xdr.onload = null;
      if (abort) {
        try {
          this.xdr.abort();
        } catch (x) {
          // intentionally empty
        }
      }
      this.unloadRef = this.xdr = null;
    };
    
    XDRObject.prototype.close = function() {
      debug('close');
      this._cleanup(true);
    };
    
    // IE 8/9 if the request target uses the same scheme - #79
    XDRObject.enabled = !!(global.XDomainRequest && browser.hasDomain());
    
    module.exports = XDRObject;
    
    }).call(this,{ env: {} },typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
    
    },{"../../utils/browser":44,"../../utils/event":46,"../../utils/url":52,"debug":54,"events":3,"inherits":56}],35:[function(require,module,exports){
    'use strict';
    
    var inherits = require('inherits')
      , XhrDriver = require('../driver/xhr')
      ;
    
    function XHRCorsObject(method, url, payload, opts) {
      XhrDriver.call(this, method, url, payload, opts);
    }
    
    inherits(XHRCorsObject, XhrDriver);
    
    XHRCorsObject.enabled = XhrDriver.enabled && XhrDriver.supportsCORS;
    
    module.exports = XHRCorsObject;
    
    },{"../driver/xhr":17,"inherits":56}],36:[function(require,module,exports){
    'use strict';
    
    var EventEmitter = require('events').EventEmitter
      , inherits = require('inherits')
      ;
    
    function XHRFake(/* method, url, payload, opts */) {
      var self = this;
      EventEmitter.call(this);
    
      this.to = setTimeout(function() {
        self.emit('finish', 200, '{}');
      }, XHRFake.timeout);
    }
    
    inherits(XHRFake, EventEmitter);
    
    XHRFake.prototype.close = function() {
      clearTimeout(this.to);
    };
    
    XHRFake.timeout = 2000;
    
    module.exports = XHRFake;
    
    },{"events":3,"inherits":56}],37:[function(require,module,exports){
    'use strict';
    
    var inherits = require('inherits')
      , XhrDriver = require('../driver/xhr')
      ;
    
    function XHRLocalObject(method, url, payload /*, opts */) {
      XhrDriver.call(this, method, url, payload, {
        noCredentials: true
      });
    }
    
    inherits(XHRLocalObject, XhrDriver);
    
    XHRLocalObject.enabled = XhrDriver.enabled;
    
    module.exports = XHRLocalObject;
    
    },{"../driver/xhr":17,"inherits":56}],38:[function(require,module,exports){
    (function (process){
    'use strict';
    
    var utils = require('../utils/event')
      , urlUtils = require('../utils/url')
      , inherits = require('inherits')
      , EventEmitter = require('events').EventEmitter
      , WebsocketDriver = require('./driver/websocket')
      ;
    
    var debug = function() {};
    if (process.env.NODE_ENV !== 'production') {
      debug = require('debug')('sockjs-client:websocket');
    }
    
    function WebSocketTransport(transUrl, ignore, options) {
      if (!WebSocketTransport.enabled()) {
        throw new Error('Transport created when disabled');
      }
    
      EventEmitter.call(this);
      debug('constructor', transUrl);
    
      var self = this;
      var url = urlUtils.addPath(transUrl, '/websocket');
      if (url.slice(0, 5) === 'https') {
        url = 'wss' + url.slice(5);
      } else {
        url = 'ws' + url.slice(4);
      }
      this.url = url;
    
      this.ws = new WebsocketDriver(this.url, [], options);
      this.ws.onmessage = function(e) {
        debug('message event', e.data);
        self.emit('message', e.data);
      };
      // Firefox has an interesting bug. If a websocket connection is
      // created after onunload, it stays alive even when user
      // navigates away from the page. In such situation let's lie -
      // let's not open the ws connection at all. See:
      // https://github.com/sockjs/sockjs-client/issues/28
      // https://bugzilla.mozilla.org/show_bug.cgi?id=696085
      this.unloadRef = utils.unloadAdd(function() {
        debug('unload');
        self.ws.close();
      });
      this.ws.onclose = function(e) {
        debug('close event', e.code, e.reason);
        self.emit('close', e.code, e.reason);
        self._cleanup();
      };
      this.ws.onerror = function(e) {
        debug('error event', e);
        self.emit('close', 1006, 'WebSocket connection broken');
        self._cleanup();
      };
    }
    
    inherits(WebSocketTransport, EventEmitter);
    
    WebSocketTransport.prototype.send = function(data) {
      var msg = '[' + data + ']';
      debug('send', msg);
      this.ws.send(msg);
    };
    
    WebSocketTransport.prototype.close = function() {
      debug('close');
      var ws = this.ws;
      this._cleanup();
      if (ws) {
        ws.close();
      }
    };
    
    WebSocketTransport.prototype._cleanup = function() {
      debug('_cleanup');
      var ws = this.ws;
      if (ws) {
        ws.onmessage = ws.onclose = ws.onerror = null;
      }
      utils.unloadDel(this.unloadRef);
      this.unloadRef = this.ws = null;
      this.removeAllListeners();
    };
    
    WebSocketTransport.enabled = function() {
      debug('enabled');
      return !!WebsocketDriver;
    };
    WebSocketTransport.transportName = 'websocket';
    
    // In theory, ws should require 1 round trip. But in chrome, this is
    // not very stable over SSL. Most likely a ws connection requires a
    // separate SSL connection, in which case 2 round trips are an
    // absolute minumum.
    WebSocketTransport.roundTrips = 2;
    
    module.exports = WebSocketTransport;
    
    }).call(this,{ env: {} })
    
    },{"../utils/event":46,"../utils/url":52,"./driver/websocket":19,"debug":54,"events":3,"inherits":56}],39:[function(require,module,exports){
    'use strict';
    
    var inherits = require('inherits')
      , AjaxBasedTransport = require('./lib/ajax-based')
      , XdrStreamingTransport = require('./xdr-streaming')
      , XhrReceiver = require('./receiver/xhr')
      , XDRObject = require('./sender/xdr')
      ;
    
    function XdrPollingTransport(transUrl) {
      if (!XDRObject.enabled) {
        throw new Error('Transport created when disabled');
      }
      AjaxBasedTransport.call(this, transUrl, '/xhr', XhrReceiver, XDRObject);
    }
    
    inherits(XdrPollingTransport, AjaxBasedTransport);
    
    XdrPollingTransport.enabled = XdrStreamingTransport.enabled;
    XdrPollingTransport.transportName = 'xdr-polling';
    XdrPollingTransport.roundTrips = 2; // preflight, ajax
    
    module.exports = XdrPollingTransport;
    
    },{"./lib/ajax-based":24,"./receiver/xhr":32,"./sender/xdr":34,"./xdr-streaming":40,"inherits":56}],40:[function(require,module,exports){
    'use strict';
    
    var inherits = require('inherits')
      , AjaxBasedTransport = require('./lib/ajax-based')
      , XhrReceiver = require('./receiver/xhr')
      , XDRObject = require('./sender/xdr')
      ;
    
    // According to:
    //   http://stackoverflow.com/questions/1641507/detect-browser-support-for-cross-domain-xmlhttprequests
    //   http://hacks.mozilla.org/2009/07/cross-site-xmlhttprequest-with-cors/
    
    function XdrStreamingTransport(transUrl) {
      if (!XDRObject.enabled) {
        throw new Error('Transport created when disabled');
      }
      AjaxBasedTransport.call(this, transUrl, '/xhr_streaming', XhrReceiver, XDRObject);
    }
    
    inherits(XdrStreamingTransport, AjaxBasedTransport);
    
    XdrStreamingTransport.enabled = function(info) {
      if (info.cookie_needed || info.nullOrigin) {
        return false;
      }
      return XDRObject.enabled && info.sameScheme;
    };
    
    XdrStreamingTransport.transportName = 'xdr-streaming';
    XdrStreamingTransport.roundTrips = 2; // preflight, ajax
    
    module.exports = XdrStreamingTransport;
    
    },{"./lib/ajax-based":24,"./receiver/xhr":32,"./sender/xdr":34,"inherits":56}],41:[function(require,module,exports){
    'use strict';
    
    var inherits = require('inherits')
      , AjaxBasedTransport = require('./lib/ajax-based')
      , XhrReceiver = require('./receiver/xhr')
      , XHRCorsObject = require('./sender/xhr-cors')
      , XHRLocalObject = require('./sender/xhr-local')
      ;
    
    function XhrPollingTransport(transUrl) {
      if (!XHRLocalObject.enabled && !XHRCorsObject.enabled) {
        throw new Error('Transport created when disabled');
      }
      AjaxBasedTransport.call(this, transUrl, '/xhr', XhrReceiver, XHRCorsObject);
    }
    
    inherits(XhrPollingTransport, AjaxBasedTransport);
    
    XhrPollingTransport.enabled = function(info) {
      if (info.nullOrigin) {
        return false;
      }
    
      if (XHRLocalObject.enabled && info.sameOrigin) {
        return true;
      }
      return XHRCorsObject.enabled;
    };
    
    XhrPollingTransport.transportName = 'xhr-polling';
    XhrPollingTransport.roundTrips = 2; // preflight, ajax
    
    module.exports = XhrPollingTransport;
    
    },{"./lib/ajax-based":24,"./receiver/xhr":32,"./sender/xhr-cors":35,"./sender/xhr-local":37,"inherits":56}],42:[function(require,module,exports){
    (function (global){
    'use strict';
    
    var inherits = require('inherits')
      , AjaxBasedTransport = require('./lib/ajax-based')
      , XhrReceiver = require('./receiver/xhr')
      , XHRCorsObject = require('./sender/xhr-cors')
      , XHRLocalObject = require('./sender/xhr-local')
      , browser = require('../utils/browser')
      ;
    
    function XhrStreamingTransport(transUrl) {
      if (!XHRLocalObject.enabled && !XHRCorsObject.enabled) {
        throw new Error('Transport created when disabled');
      }
      AjaxBasedTransport.call(this, transUrl, '/xhr_streaming', XhrReceiver, XHRCorsObject);
    }
    
    inherits(XhrStreamingTransport, AjaxBasedTransport);
    
    XhrStreamingTransport.enabled = function(info) {
      if (info.nullOrigin) {
        return false;
      }
      // Opera doesn't support xhr-streaming #60
      // But it might be able to #92
      if (browser.isOpera()) {
        return false;
      }
    
      return XHRCorsObject.enabled;
    };
    
    XhrStreamingTransport.transportName = 'xhr-streaming';
    XhrStreamingTransport.roundTrips = 2; // preflight, ajax
    
    // Safari gets confused when a streaming ajax request is started
    // before onload. This causes the load indicator to spin indefinetely.
    // Only require body when used in a browser
    XhrStreamingTransport.needBody = !!global.document;
    
    module.exports = XhrStreamingTransport;
    
    }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
    
    },{"../utils/browser":44,"./lib/ajax-based":24,"./receiver/xhr":32,"./sender/xhr-cors":35,"./sender/xhr-local":37,"inherits":56}],43:[function(require,module,exports){
    (function (global){
    'use strict';
    
    if (global.crypto && global.crypto.getRandomValues) {
      module.exports.randomBytes = function(length) {
        var bytes = new Uint8Array(length);
        global.crypto.getRandomValues(bytes);
        return bytes;
      };
    } else {
      module.exports.randomBytes = function(length) {
        var bytes = new Array(length);
        for (var i = 0; i < length; i++) {
          bytes[i] = Math.floor(Math.random() * 256);
        }
        return bytes;
      };
    }
    
    }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
    
    },{}],44:[function(require,module,exports){
    (function (global){
    'use strict';
    
    module.exports = {
      isOpera: function() {
        return global.navigator &&
          /opera/i.test(global.navigator.userAgent);
      }
    
    , isKonqueror: function() {
        return global.navigator &&
          /konqueror/i.test(global.navigator.userAgent);
      }
    
      // #187 wrap document.domain in try/catch because of WP8 from file:///
    , hasDomain: function () {
        // non-browser client always has a domain
        if (!global.document) {
          return true;
        }
    
        try {
          return !!global.document.domain;
        } catch (e) {
          return false;
        }
      }
    };
    
    }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
    
    },{}],45:[function(require,module,exports){
    'use strict';
    
    var JSON3 = require('json3');
    
    // Some extra characters that Chrome gets wrong, and substitutes with
    // something else on the wire.
    // eslint-disable-next-line no-control-regex
    var extraEscapable = /[\x00-\x1f\ud800-\udfff\ufffe\uffff\u0300-\u0333\u033d-\u0346\u034a-\u034c\u0350-\u0352\u0357-\u0358\u035c-\u0362\u0374\u037e\u0387\u0591-\u05af\u05c4\u0610-\u0617\u0653-\u0654\u0657-\u065b\u065d-\u065e\u06df-\u06e2\u06eb-\u06ec\u0730\u0732-\u0733\u0735-\u0736\u073a\u073d\u073f-\u0741\u0743\u0745\u0747\u07eb-\u07f1\u0951\u0958-\u095f\u09dc-\u09dd\u09df\u0a33\u0a36\u0a59-\u0a5b\u0a5e\u0b5c-\u0b5d\u0e38-\u0e39\u0f43\u0f4d\u0f52\u0f57\u0f5c\u0f69\u0f72-\u0f76\u0f78\u0f80-\u0f83\u0f93\u0f9d\u0fa2\u0fa7\u0fac\u0fb9\u1939-\u193a\u1a17\u1b6b\u1cda-\u1cdb\u1dc0-\u1dcf\u1dfc\u1dfe\u1f71\u1f73\u1f75\u1f77\u1f79\u1f7b\u1f7d\u1fbb\u1fbe\u1fc9\u1fcb\u1fd3\u1fdb\u1fe3\u1feb\u1fee-\u1fef\u1ff9\u1ffb\u1ffd\u2000-\u2001\u20d0-\u20d1\u20d4-\u20d7\u20e7-\u20e9\u2126\u212a-\u212b\u2329-\u232a\u2adc\u302b-\u302c\uaab2-\uaab3\uf900-\ufa0d\ufa10\ufa12\ufa15-\ufa1e\ufa20\ufa22\ufa25-\ufa26\ufa2a-\ufa2d\ufa30-\ufa6d\ufa70-\ufad9\ufb1d\ufb1f\ufb2a-\ufb36\ufb38-\ufb3c\ufb3e\ufb40-\ufb41\ufb43-\ufb44\ufb46-\ufb4e\ufff0-\uffff]/g
      , extraLookup;
    
    // This may be quite slow, so let's delay until user actually uses bad
    // characters.
    var unrollLookup = function(escapable) {
      var i;
      var unrolled = {};
      var c = [];
      for (i = 0; i < 65536; i++) {
        c.push( String.fromCharCode(i) );
      }
      escapable.lastIndex = 0;
      c.join('').replace(escapable, function(a) {
        unrolled[ a ] = '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
        return '';
      });
      escapable.lastIndex = 0;
      return unrolled;
    };
    
    // Quote string, also taking care of unicode characters that browsers
    // often break. Especially, take care of unicode surrogates:
    // http://en.wikipedia.org/wiki/Mapping_of_Unicode_characters#Surrogates
    module.exports = {
      quote: function(string) {
        var quoted = JSON3.stringify(string);
    
        // In most cases this should be very fast and good enough.
        extraEscapable.lastIndex = 0;
        if (!extraEscapable.test(quoted)) {
          return quoted;
        }
    
        if (!extraLookup) {
          extraLookup = unrollLookup(extraEscapable);
        }
    
        return quoted.replace(extraEscapable, function(a) {
          return extraLookup[a];
        });
      }
    };
    
    },{"json3":57}],46:[function(require,module,exports){
    (function (global){
    'use strict';
    
    var random = require('./random');
    
    var onUnload = {}
      , afterUnload = false
        // detect google chrome packaged apps because they don't allow the 'unload' event
      , isChromePackagedApp = global.chrome && global.chrome.app && global.chrome.app.runtime
      ;
    
    module.exports = {
      attachEvent: function(event, listener) {
        if (typeof global.addEventListener !== 'undefined') {
          global.addEventListener(event, listener, false);
        } else if (global.document && global.attachEvent) {
          // IE quirks.
          // According to: http://stevesouders.com/misc/test-postmessage.php
          // the message gets delivered only to 'document', not 'window'.
          global.document.attachEvent('on' + event, listener);
          // I get 'window' for ie8.
          global.attachEvent('on' + event, listener);
        }
      }
    
    , detachEvent: function(event, listener) {
        if (typeof global.addEventListener !== 'undefined') {
          global.removeEventListener(event, listener, false);
        } else if (global.document && global.detachEvent) {
          global.document.detachEvent('on' + event, listener);
          global.detachEvent('on' + event, listener);
        }
      }
    
    , unloadAdd: function(listener) {
        if (isChromePackagedApp) {
          return null;
        }
    
        var ref = random.string(8);
        onUnload[ref] = listener;
        if (afterUnload) {
          setTimeout(this.triggerUnloadCallbacks, 0);
        }
        return ref;
      }
    
    , unloadDel: function(ref) {
        if (ref in onUnload) {
          delete onUnload[ref];
        }
      }
    
    , triggerUnloadCallbacks: function() {
        for (var ref in onUnload) {
          onUnload[ref]();
          delete onUnload[ref];
        }
      }
    };
    
    var unloadTriggered = function() {
      if (afterUnload) {
        return;
      }
      afterUnload = true;
      module.exports.triggerUnloadCallbacks();
    };
    
    // 'unload' alone is not reliable in opera within an iframe, but we
    // can't use `beforeunload` as IE fires it on javascript: links.
    if (!isChromePackagedApp) {
      module.exports.attachEvent('unload', unloadTriggered);
    }
    
    }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
    
    },{"./random":50}],47:[function(require,module,exports){
    (function (process,global){
    'use strict';
    
    var eventUtils = require('./event')
      , JSON3 = require('json3')
      , browser = require('./browser')
      ;
    
    var debug = function() {};
    if (process.env.NODE_ENV !== 'production') {
      debug = require('debug')('sockjs-client:utils:iframe');
    }
    
    module.exports = {
      WPrefix: '_jp'
    , currentWindowId: null
    
    , polluteGlobalNamespace: function() {
        if (!(module.exports.WPrefix in global)) {
          global[module.exports.WPrefix] = {};
        }
      }
    
    , postMessage: function(type, data) {
        if (global.parent !== global) {
          global.parent.postMessage(JSON3.stringify({
            windowId: module.exports.currentWindowId
          , type: type
          , data: data || ''
          }), '*');
        } else {
          debug('Cannot postMessage, no parent window.', type, data);
        }
      }
    
    , createIframe: function(iframeUrl, errorCallback) {
        var iframe = global.document.createElement('iframe');
        var tref, unloadRef;
        var unattach = function() {
          debug('unattach');
          clearTimeout(tref);
          // Explorer had problems with that.
          try {
            iframe.onload = null;
          } catch (x) {
            // intentionally empty
          }
          iframe.onerror = null;
        };
        var cleanup = function() {
          debug('cleanup');
          if (iframe) {
            unattach();
            // This timeout makes chrome fire onbeforeunload event
            // within iframe. Without the timeout it goes straight to
            // onunload.
            setTimeout(function() {
              if (iframe) {
                iframe.parentNode.removeChild(iframe);
              }
              iframe = null;
            }, 0);
            eventUtils.unloadDel(unloadRef);
          }
        };
        var onerror = function(err) {
          debug('onerror', err);
          if (iframe) {
            cleanup();
            errorCallback(err);
          }
        };
        var post = function(msg, origin) {
          debug('post', msg, origin);
          try {
            // When the iframe is not loaded, IE raises an exception
            // on 'contentWindow'.
            setTimeout(function() {
              if (iframe && iframe.contentWindow) {
                iframe.contentWindow.postMessage(msg, origin);
              }
            }, 0);
          } catch (x) {
            // intentionally empty
          }
        };
    
        iframe.src = iframeUrl;
        iframe.style.display = 'none';
        iframe.style.position = 'absolute';
        iframe.onerror = function() {
          onerror('onerror');
        };
        iframe.onload = function() {
          debug('onload');
          // `onload` is triggered before scripts on the iframe are
          // executed. Give it few seconds to actually load stuff.
          clearTimeout(tref);
          tref = setTimeout(function() {
            onerror('onload timeout');
          }, 2000);
        };
        global.document.body.appendChild(iframe);
        tref = setTimeout(function() {
          onerror('timeout');
        }, 15000);
        unloadRef = eventUtils.unloadAdd(cleanup);
        return {
          post: post
        , cleanup: cleanup
        , loaded: unattach
        };
      }
    
    /* eslint no-undef: "off", new-cap: "off" */
    , createHtmlfile: function(iframeUrl, errorCallback) {
        var axo = ['Active'].concat('Object').join('X');
        var doc = new global[axo]('htmlfile');
        var tref, unloadRef;
        var iframe;
        var unattach = function() {
          clearTimeout(tref);
          iframe.onerror = null;
        };
        var cleanup = function() {
          if (doc) {
            unattach();
            eventUtils.unloadDel(unloadRef);
            iframe.parentNode.removeChild(iframe);
            iframe = doc = null;
            CollectGarbage();
          }
        };
        var onerror = function(r) {
          debug('onerror', r);
          if (doc) {
            cleanup();
            errorCallback(r);
          }
        };
        var post = function(msg, origin) {
          try {
            // When the iframe is not loaded, IE raises an exception
            // on 'contentWindow'.
            setTimeout(function() {
              if (iframe && iframe.contentWindow) {
                  iframe.contentWindow.postMessage(msg, origin);
              }
            }, 0);
          } catch (x) {
            // intentionally empty
          }
        };
    
        doc.open();
        doc.write('<html><s' + 'cript>' +
                  'document.domain="' + global.document.domain + '";' +
                  '</s' + 'cript></html>');
        doc.close();
        doc.parentWindow[module.exports.WPrefix] = global[module.exports.WPrefix];
        var c = doc.createElement('div');
        doc.body.appendChild(c);
        iframe = doc.createElement('iframe');
        c.appendChild(iframe);
        iframe.src = iframeUrl;
        iframe.onerror = function() {
          onerror('onerror');
        };
        tref = setTimeout(function() {
          onerror('timeout');
        }, 15000);
        unloadRef = eventUtils.unloadAdd(cleanup);
        return {
          post: post
        , cleanup: cleanup
        , loaded: unattach
        };
      }
    };
    
    module.exports.iframeEnabled = false;
    if (global.document) {
      // postMessage misbehaves in konqueror 4.6.5 - the messages are delivered with
      // huge delay, or not at all.
      module.exports.iframeEnabled = (typeof global.postMessage === 'function' ||
        typeof global.postMessage === 'object') && (!browser.isKonqueror());
    }
    
    }).call(this,{ env: {} },typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
    
    },{"./browser":44,"./event":46,"debug":54,"json3":57}],48:[function(require,module,exports){
    (function (global){
    'use strict';
    
    var logObject = {};
    ['log', 'debug', 'warn'].forEach(function (level) {
      var levelExists;
    
      try {
        levelExists = global.console && global.console[level] && global.console[level].apply;
      } catch(e) {
        // do nothing
      }
    
      logObject[level] = levelExists ? function () {
        return global.console[level].apply(global.console, arguments);
      } : (level === 'log' ? function () {} : logObject.log);
    });
    
    module.exports = logObject;
    
    }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
    
    },{}],49:[function(require,module,exports){
    'use strict';
    
    module.exports = {
      isObject: function(obj) {
        var type = typeof obj;
        return type === 'function' || type === 'object' && !!obj;
      }
    
    , extend: function(obj) {
        if (!this.isObject(obj)) {
          return obj;
        }
        var source, prop;
        for (var i = 1, length = arguments.length; i < length; i++) {
          source = arguments[i];
          for (prop in source) {
            if (Object.prototype.hasOwnProperty.call(source, prop)) {
              obj[prop] = source[prop];
            }
          }
        }
        return obj;
      }
    };
    
    },{}],50:[function(require,module,exports){
    'use strict';
    
    /* global crypto:true */
    var crypto = require('crypto');
    
    // This string has length 32, a power of 2, so the modulus doesn't introduce a
    // bias.
    var _randomStringChars = 'abcdefghijklmnopqrstuvwxyz012345';
    module.exports = {
      string: function(length) {
        var max = _randomStringChars.length;
        var bytes = crypto.randomBytes(length);
        var ret = [];
        for (var i = 0; i < length; i++) {
          ret.push(_randomStringChars.substr(bytes[i] % max, 1));
        }
        return ret.join('');
      }
    
    , number: function(max) {
        return Math.floor(Math.random() * max);
      }
    
    , numberString: function(max) {
        var t = ('' + (max - 1)).length;
        var p = new Array(t + 1).join('0');
        return (p + this.number(max)).slice(-t);
      }
    };
    
    },{"crypto":43}],51:[function(require,module,exports){
    (function (process){
    'use strict';
    
    var debug = function() {};
    if (process.env.NODE_ENV !== 'production') {
      debug = require('debug')('sockjs-client:utils:transport');
    }
    
    module.exports = function(availableTransports) {
      return {
        filterToEnabled: function(transportsWhitelist, info) {
          var transports = {
            main: []
          , facade: []
          };
          if (!transportsWhitelist) {
            transportsWhitelist = [];
          } else if (typeof transportsWhitelist === 'string') {
            transportsWhitelist = [transportsWhitelist];
          }
    
          availableTransports.forEach(function(trans) {
            if (!trans) {
              return;
            }
    
            if (trans.transportName === 'websocket' && info.websocket === false) {
              debug('disabled from server', 'websocket');
              return;
            }
    
            if (transportsWhitelist.length &&
                transportsWhitelist.indexOf(trans.transportName) === -1) {
              debug('not in whitelist', trans.transportName);
              return;
            }
    
            if (trans.enabled(info)) {
              debug('enabled', trans.transportName);
              transports.main.push(trans);
              if (trans.facadeTransport) {
                transports.facade.push(trans.facadeTransport);
              }
            } else {
              debug('disabled', trans.transportName);
            }
          });
          return transports;
        }
      };
    };
    
    }).call(this,{ env: {} })
    
    },{"debug":54}],52:[function(require,module,exports){
    (function (process){
    'use strict';
    
    var URL = require('url-parse');
    
    var debug = function() {};
    if (process.env.NODE_ENV !== 'production') {
      debug = require('debug')('sockjs-client:utils:url');
    }
    
    module.exports = {
      getOrigin: function(url) {
        if (!url) {
          return null;
        }
    
        var p = new URL(url);
        if (p.protocol === 'file:') {
          return null;
        }
    
        var port = p.port;
        if (!port) {
          port = (p.protocol === 'https:') ? '443' : '80';
        }
    
        return p.protocol + '//' + p.hostname + ':' + port;
      }
    
    , isOriginEqual: function(a, b) {
        var res = this.getOrigin(a) === this.getOrigin(b);
        debug('same', a, b, res);
        return res;
      }
    
    , isSchemeEqual: function(a, b) {
        return (a.split(':')[0] === b.split(':')[0]);
      }
    
    , addPath: function (url, path) {
        var qs = url.split('?');
        return qs[0] + path + (qs[1] ? '?' + qs[1] : '');
      }
    
    , addQuery: function (url, q) {
        return url + (url.indexOf('?') === -1 ? ('?' + q) : ('&' + q));
      }
    };
    
    }).call(this,{ env: {} })
    
    },{"debug":54,"url-parse":61}],53:[function(require,module,exports){
    module.exports = '1.1.2';
    
    },{}],54:[function(require,module,exports){
    (function (process){
    /**
     * This is the web browser implementation of `debug()`.
     *
     * Expose `debug()` as the module.
     */
    
    exports = module.exports = require('./debug');
    exports.log = log;
    exports.formatArgs = formatArgs;
    exports.save = save;
    exports.load = load;
    exports.useColors = useColors;
    exports.storage = 'undefined' != typeof chrome
                   && 'undefined' != typeof chrome.storage
                      ? chrome.storage.local
                      : localstorage();
    
    /**
     * Colors.
     */
    
    exports.colors = [
      'lightseagreen',
      'forestgreen',
      'goldenrod',
      'dodgerblue',
      'darkorchid',
      'crimson'
    ];
    
    /**
     * Currently only WebKit-based Web Inspectors, Firefox >= v31,
     * and the Firebug extension (any Firefox version) are known
     * to support "%c" CSS customizations.
     *
     * TODO: add a `localStorage` variable to explicitly enable/disable colors
     */
    
    function useColors() {
      // NB: In an Electron preload script, document will be defined but not fully
      // initialized. Since we know we're in Chrome, we'll just detect this case
      // explicitly
      if (typeof window !== 'undefined' && window && typeof window.process !== 'undefined' && window.process.type === 'renderer') {
        return true;
      }
    
      // is webkit? http://stackoverflow.com/a/16459606/376773
      // document is undefined in react-native: https://github.com/facebook/react-native/pull/1632
      return (typeof document !== 'undefined' && document && 'WebkitAppearance' in document.documentElement.style) ||
        // is firebug? http://stackoverflow.com/a/398120/376773
        (typeof window !== 'undefined' && window && window.console && (console.firebug || (console.exception && console.table))) ||
        // is firefox >= v31?
        // https://developer.mozilla.org/en-US/docs/Tools/Web_Console#Styling_messages
        (typeof navigator !== 'undefined' && navigator && navigator.userAgent && navigator.userAgent.toLowerCase().match(/firefox\/(\d+)/) && parseInt(RegExp.$1, 10) >= 31) ||
        // double check webkit in userAgent just in case we are in a worker
        (typeof navigator !== 'undefined' && navigator && navigator.userAgent && navigator.userAgent.toLowerCase().match(/applewebkit\/(\d+)/));
    }
    
    /**
     * Map %j to `JSON.stringify()`, since no Web Inspectors do that by default.
     */
    
    exports.formatters.j = function(v) {
      try {
        return JSON.stringify(v);
      } catch (err) {
        return '[UnexpectedJSONParseError]: ' + err.message;
      }
    };
    
    
    /**
     * Colorize log arguments if enabled.
     *
     * @api public
     */
    
    function formatArgs(args) {
      var useColors = this.useColors;
    
      args[0] = (useColors ? '%c' : '')
        + this.namespace
        + (useColors ? ' %c' : ' ')
        + args[0]
        + (useColors ? '%c ' : ' ')
        + '+' + exports.humanize(this.diff);
    
      if (!useColors) return;
    
      var c = 'color: ' + this.color;
      args.splice(1, 0, c, 'color: inherit')
    
      // the final "%c" is somewhat tricky, because there could be other
      // arguments passed either before or after the %c, so we need to
      // figure out the correct index to insert the CSS into
      var index = 0;
      var lastC = 0;
      args[0].replace(/%[a-zA-Z%]/g, function(match) {
        if ('%%' === match) return;
        index++;
        if ('%c' === match) {
          // we only are interested in the *last* %c
          // (the user may have provided their own)
          lastC = index;
        }
      });
    
      args.splice(lastC, 0, c);
    }
    
    /**
     * Invokes `console.log()` when available.
     * No-op when `console.log` is not a "function".
     *
     * @api public
     */
    
    function log() {
      // this hackery is required for IE8/9, where
      // the `console.log` function doesn't have 'apply'
      return 'object' === typeof console
        && console.log
        && Function.prototype.apply.call(console.log, console, arguments);
    }
    
    /**
     * Save `namespaces`.
     *
     * @param {String} namespaces
     * @api private
     */
    
    function save(namespaces) {
      try {
        if (null == namespaces) {
          exports.storage.removeItem('debug');
        } else {
          exports.storage.debug = namespaces;
        }
      } catch(e) {}
    }
    
    /**
     * Load `namespaces`.
     *
     * @return {String} returns the previously persisted debug modes
     * @api private
     */
    
    function load() {
      try {
        return exports.storage.debug;
      } catch(e) {}
    
      // If debug isn't set in LS, and we're in Electron, try to load $DEBUG
      if (typeof process !== 'undefined' && 'env' in process) {
        return process.env.DEBUG;
      }
    }
    
    /**
     * Enable namespaces listed in `localStorage.debug` initially.
     */
    
    exports.enable(load());
    
    /**
     * Localstorage attempts to return the localstorage.
     *
     * This is necessary because safari throws
     * when a user disables cookies/localstorage
     * and you attempt to access it.
     *
     * @return {LocalStorage}
     * @api private
     */
    
    function localstorage() {
      try {
        return window.localStorage;
      } catch (e) {}
    }
    
    }).call(this,{ env: {} })
    
    },{"./debug":55}],55:[function(require,module,exports){
    
    /**
     * This is the common logic for both the Node.js and web browser
     * implementations of `debug()`.
     *
     * Expose `debug()` as the module.
     */
    
    exports = module.exports = createDebug.debug = createDebug.default = createDebug;
    exports.coerce = coerce;
    exports.disable = disable;
    exports.enable = enable;
    exports.enabled = enabled;
    exports.humanize = require('ms');
    
    /**
     * The currently active debug mode names, and names to skip.
     */
    
    exports.names = [];
    exports.skips = [];
    
    /**
     * Map of special "%n" handling functions, for the debug "format" argument.
     *
     * Valid key names are a single, lower or upper-case letter, i.e. "n" and "N".
     */
    
    exports.formatters = {};
    
    /**
     * Previous log timestamp.
     */
    
    var prevTime;
    
    /**
     * Select a color.
     * @param {String} namespace
     * @return {Number}
     * @api private
     */
    
    function selectColor(namespace) {
      var hash = 0, i;
    
      for (i in namespace) {
        hash  = ((hash << 5) - hash) + namespace.charCodeAt(i);
        hash |= 0; // Convert to 32bit integer
      }
    
      return exports.colors[Math.abs(hash) % exports.colors.length];
    }
    
    /**
     * Create a debugger with the given `namespace`.
     *
     * @param {String} namespace
     * @return {Function}
     * @api public
     */
    
    function createDebug(namespace) {
    
      function debug() {
        // disabled?
        if (!debug.enabled) return;
    
        var self = debug;
    
        // set `diff` timestamp
        var curr = +new Date();
        var ms = curr - (prevTime || curr);
        self.diff = ms;
        self.prev = prevTime;
        self.curr = curr;
        prevTime = curr;
    
        // turn the `arguments` into a proper Array
        var args = new Array(arguments.length);
        for (var i = 0; i < args.length; i++) {
          args[i] = arguments[i];
        }
    
        args[0] = exports.coerce(args[0]);
    
        if ('string' !== typeof args[0]) {
          // anything else let's inspect with %O
          args.unshift('%O');
        }
    
        // apply any `formatters` transformations
        var index = 0;
        args[0] = args[0].replace(/%([a-zA-Z%])/g, function(match, format) {
          // if we encounter an escaped % then don't increase the array index
          if (match === '%%') return match;
          index++;
          var formatter = exports.formatters[format];
          if ('function' === typeof formatter) {
            var val = args[index];
            match = formatter.call(self, val);
    
            // now we need to remove `args[index]` since it's inlined in the `format`
            args.splice(index, 1);
            index--;
          }
          return match;
        });
    
        // apply env-specific formatting (colors, etc.)
        exports.formatArgs.call(self, args);
    
        var logFn = debug.log || exports.log || console.log.bind(console);
        logFn.apply(self, args);
      }
    
      debug.namespace = namespace;
      debug.enabled = exports.enabled(namespace);
      debug.useColors = exports.useColors();
      debug.color = selectColor(namespace);
    
      // env-specific initialization logic for debug instances
      if ('function' === typeof exports.init) {
        exports.init(debug);
      }
    
      return debug;
    }
    
    /**
     * Enables a debug mode by namespaces. This can include modes
     * separated by a colon and wildcards.
     *
     * @param {String} namespaces
     * @api public
     */
    
    function enable(namespaces) {
      exports.save(namespaces);
    
      var split = (namespaces || '').split(/[\s,]+/);
      var len = split.length;
    
      for (var i = 0; i < len; i++) {
        if (!split[i]) continue; // ignore empty strings
        namespaces = split[i].replace(/\*/g, '.*?');
        if (namespaces[0] === '-') {
          exports.skips.push(new RegExp('^' + namespaces.substr(1) + '$'));
        } else {
          exports.names.push(new RegExp('^' + namespaces + '$'));
        }
      }
    }
    
    /**
     * Disable debug output.
     *
     * @api public
     */
    
    function disable() {
      exports.enable('');
    }
    
    /**
     * Returns true if the given mode name is enabled, false otherwise.
     *
     * @param {String} name
     * @return {Boolean}
     * @api public
     */
    
    function enabled(name) {
      var i, len;
      for (i = 0, len = exports.skips.length; i < len; i++) {
        if (exports.skips[i].test(name)) {
          return false;
        }
      }
      for (i = 0, len = exports.names.length; i < len; i++) {
        if (exports.names[i].test(name)) {
          return true;
        }
      }
      return false;
    }
    
    /**
     * Coerce `val`.
     *
     * @param {Mixed} val
     * @return {Mixed}
     * @api private
     */
    
    function coerce(val) {
      if (val instanceof Error) return val.stack || val.message;
      return val;
    }
    
    },{"ms":58}],56:[function(require,module,exports){
    if (typeof Object.create === 'function') {
      // implementation from standard node.js 'util' module
      module.exports = function inherits(ctor, superCtor) {
        ctor.super_ = superCtor
        ctor.prototype = Object.create(superCtor.prototype, {
          constructor: {
            value: ctor,
            enumerable: false,
            writable: true,
            configurable: true
          }
        });
      };
    } else {
      // old school shim for old browsers
      module.exports = function inherits(ctor, superCtor) {
        ctor.super_ = superCtor
        var TempCtor = function () {}
        TempCtor.prototype = superCtor.prototype
        ctor.prototype = new TempCtor()
        ctor.prototype.constructor = ctor
      }
    }
    
    },{}],57:[function(require,module,exports){
    (function (global){
    /*! JSON v3.3.2 | http://bestiejs.github.io/json3 | Copyright 2012-2014, Kit Cambridge | http://kit.mit-license.org */
    ;(function () {
      // Detect the `define` function exposed by asynchronous module loaders. The
      // strict `define` check is necessary for compatibility with `r.js`.
      var isLoader = typeof define === "function" && define.amd;
    
      // A set of types used to distinguish objects from primitives.
      var objectTypes = {
        "function": true,
        "object": true
      };
    
      // Detect the `exports` object exposed by CommonJS implementations.
      var freeExports = objectTypes[typeof exports] && exports && !exports.nodeType && exports;
    
      // Use the `global` object exposed by Node (including Browserify via
      // `insert-module-globals`), Narwhal, and Ringo as the default context,
      // and the `window` object in browsers. Rhino exports a `global` function
      // instead.
      var root = objectTypes[typeof window] && window || this,
          freeGlobal = freeExports && objectTypes[typeof module] && module && !module.nodeType && typeof global == "object" && global;
    
      if (freeGlobal && (freeGlobal["global"] === freeGlobal || freeGlobal["window"] === freeGlobal || freeGlobal["self"] === freeGlobal)) {
        root = freeGlobal;
      }
    
      // Public: Initializes JSON 3 using the given `context` object, attaching the
      // `stringify` and `parse` functions to the specified `exports` object.
      function runInContext(context, exports) {
        context || (context = root["Object"]());
        exports || (exports = root["Object"]());
    
        // Native constructor aliases.
        var Number = context["Number"] || root["Number"],
            String = context["String"] || root["String"],
            Object = context["Object"] || root["Object"],
            Date = context["Date"] || root["Date"],
            SyntaxError = context["SyntaxError"] || root["SyntaxError"],
            TypeError = context["TypeError"] || root["TypeError"],
            Math = context["Math"] || root["Math"],
            nativeJSON = context["JSON"] || root["JSON"];
    
        // Delegate to the native `stringify` and `parse` implementations.
        if (typeof nativeJSON == "object" && nativeJSON) {
          exports.stringify = nativeJSON.stringify;
          exports.parse = nativeJSON.parse;
        }
    
        // Convenience aliases.
        var objectProto = Object.prototype,
            getClass = objectProto.toString,
            isProperty, forEach, undef;
    
        // Test the `Date#getUTC*` methods. Based on work by @Yaffle.
        var isExtended = new Date(-3509827334573292);
        try {
          // The `getUTCFullYear`, `Month`, and `Date` methods return nonsensical
          // results for certain dates in Opera >= 10.53.
          isExtended = isExtended.getUTCFullYear() == -109252 && isExtended.getUTCMonth() === 0 && isExtended.getUTCDate() === 1 &&
            // Safari < 2.0.2 stores the internal millisecond time value correctly,
            // but clips the values returned by the date methods to the range of
            // signed 32-bit integers ([-2 ** 31, 2 ** 31 - 1]).
            isExtended.getUTCHours() == 10 && isExtended.getUTCMinutes() == 37 && isExtended.getUTCSeconds() == 6 && isExtended.getUTCMilliseconds() == 708;
        } catch (exception) {}
    
        // Internal: Determines whether the native `JSON.stringify` and `parse`
        // implementations are spec-compliant. Based on work by Ken Snyder.
        function has(name) {
          if (has[name] !== undef) {
            // Return cached feature test result.
            return has[name];
          }
          var isSupported;
          if (name == "bug-string-char-index") {
            // IE <= 7 doesn't support accessing string characters using square
            // bracket notation. IE 8 only supports this for primitives.
            isSupported = "a"[0] != "a";
          } else if (name == "json") {
            // Indicates whether both `JSON.stringify` and `JSON.parse` are
            // supported.
            isSupported = has("json-stringify") && has("json-parse");
          } else {
            var value, serialized = '{"a":[1,true,false,null,"\\u0000\\b\\n\\f\\r\\t"]}';
            // Test `JSON.stringify`.
            if (name == "json-stringify") {
              var stringify = exports.stringify, stringifySupported = typeof stringify == "function" && isExtended;
              if (stringifySupported) {
                // A test function object with a custom `toJSON` method.
                (value = function () {
                  return 1;
                }).toJSON = value;
                try {
                  stringifySupported =
                    // Firefox 3.1b1 and b2 serialize string, number, and boolean
                    // primitives as object literals.
                    stringify(0) === "0" &&
                    // FF 3.1b1, b2, and JSON 2 serialize wrapped primitives as object
                    // literals.
                    stringify(new Number()) === "0" &&
                    stringify(new String()) == '""' &&
                    // FF 3.1b1, 2 throw an error if the value is `null`, `undefined`, or
                    // does not define a canonical JSON representation (this applies to
                    // objects with `toJSON` properties as well, *unless* they are nested
                    // within an object or array).
                    stringify(getClass) === undef &&
                    // IE 8 serializes `undefined` as `"undefined"`. Safari <= 5.1.7 and
                    // FF 3.1b3 pass this test.
                    stringify(undef) === undef &&
                    // Safari <= 5.1.7 and FF 3.1b3 throw `Error`s and `TypeError`s,
                    // respectively, if the value is omitted entirely.
                    stringify() === undef &&
                    // FF 3.1b1, 2 throw an error if the given value is not a number,
                    // string, array, object, Boolean, or `null` literal. This applies to
                    // objects with custom `toJSON` methods as well, unless they are nested
                    // inside object or array literals. YUI 3.0.0b1 ignores custom `toJSON`
                    // methods entirely.
                    stringify(value) === "1" &&
                    stringify([value]) == "[1]" &&
                    // Prototype <= 1.6.1 serializes `[undefined]` as `"[]"` instead of
                    // `"[null]"`.
                    stringify([undef]) == "[null]" &&
                    // YUI 3.0.0b1 fails to serialize `null` literals.
                    stringify(null) == "null" &&
                    // FF 3.1b1, 2 halts serialization if an array contains a function:
                    // `[1, true, getClass, 1]` serializes as "[1,true,],". FF 3.1b3
                    // elides non-JSON values from objects and arrays, unless they
                    // define custom `toJSON` methods.
                    stringify([undef, getClass, null]) == "[null,null,null]" &&
                    // Simple serialization test. FF 3.1b1 uses Unicode escape sequences
                    // where character escape codes are expected (e.g., `\b` => `\u0008`).
                    stringify({ "a": [value, true, false, null, "\x00\b\n\f\r\t"] }) == serialized &&
                    // FF 3.1b1 and b2 ignore the `filter` and `width` arguments.
                    stringify(null, value) === "1" &&
                    stringify([1, 2], null, 1) == "[\n 1,\n 2\n]" &&
                    // JSON 2, Prototype <= 1.7, and older WebKit builds incorrectly
                    // serialize extended years.
                    stringify(new Date(-8.64e15)) == '"-271821-04-20T00:00:00.000Z"' &&
                    // The milliseconds are optional in ES 5, but required in 5.1.
                    stringify(new Date(8.64e15)) == '"+275760-09-13T00:00:00.000Z"' &&
                    // Firefox <= 11.0 incorrectly serializes years prior to 0 as negative
                    // four-digit years instead of six-digit years. Credits: @Yaffle.
                    stringify(new Date(-621987552e5)) == '"-000001-01-01T00:00:00.000Z"' &&
                    // Safari <= 5.1.5 and Opera >= 10.53 incorrectly serialize millisecond
                    // values less than 1000. Credits: @Yaffle.
                    stringify(new Date(-1)) == '"1969-12-31T23:59:59.999Z"';
                } catch (exception) {
                  stringifySupported = false;
                }
              }
              isSupported = stringifySupported;
            }
            // Test `JSON.parse`.
            if (name == "json-parse") {
              var parse = exports.parse;
              if (typeof parse == "function") {
                try {
                  // FF 3.1b1, b2 will throw an exception if a bare literal is provided.
                  // Conforming implementations should also coerce the initial argument to
                  // a string prior to parsing.
                  if (parse("0") === 0 && !parse(false)) {
                    // Simple parsing test.
                    value = parse(serialized);
                    var parseSupported = value["a"].length == 5 && value["a"][0] === 1;
                    if (parseSupported) {
                      try {
                        // Safari <= 5.1.2 and FF 3.1b1 allow unescaped tabs in strings.
                        parseSupported = !parse('"\t"');
                      } catch (exception) {}
                      if (parseSupported) {
                        try {
                          // FF 4.0 and 4.0.1 allow leading `+` signs and leading
                          // decimal points. FF 4.0, 4.0.1, and IE 9-10 also allow
                          // certain octal literals.
                          parseSupported = parse("01") !== 1;
                        } catch (exception) {}
                      }
                      if (parseSupported) {
                        try {
                          // FF 4.0, 4.0.1, and Rhino 1.7R3-R4 allow trailing decimal
                          // points. These environments, along with FF 3.1b1 and 2,
                          // also allow trailing commas in JSON objects and arrays.
                          parseSupported = parse("1.") !== 1;
                        } catch (exception) {}
                      }
                    }
                  }
                } catch (exception) {
                  parseSupported = false;
                }
              }
              isSupported = parseSupported;
            }
          }
          return has[name] = !!isSupported;
        }
    
        if (!has("json")) {
          // Common `[[Class]]` name aliases.
          var functionClass = "[object Function]",
              dateClass = "[object Date]",
              numberClass = "[object Number]",
              stringClass = "[object String]",
              arrayClass = "[object Array]",
              booleanClass = "[object Boolean]";
    
          // Detect incomplete support for accessing string characters by index.
          var charIndexBuggy = has("bug-string-char-index");
    
          // Define additional utility methods if the `Date` methods are buggy.
          if (!isExtended) {
            var floor = Math.floor;
            // A mapping between the months of the year and the number of days between
            // January 1st and the first of the respective month.
            var Months = [0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334];
            // Internal: Calculates the number of days between the Unix epoch and the
            // first day of the given month.
            var getDay = function (year, month) {
              return Months[month] + 365 * (year - 1970) + floor((year - 1969 + (month = +(month > 1))) / 4) - floor((year - 1901 + month) / 100) + floor((year - 1601 + month) / 400);
            };
          }
    
          // Internal: Determines if a property is a direct property of the given
          // object. Delegates to the native `Object#hasOwnProperty` method.
          if (!(isProperty = objectProto.hasOwnProperty)) {
            isProperty = function (property) {
              var members = {}, constructor;
              if ((members.__proto__ = null, members.__proto__ = {
                // The *proto* property cannot be set multiple times in recent
                // versions of Firefox and SeaMonkey.
                "toString": 1
              }, members).toString != getClass) {
                // Safari <= 2.0.3 doesn't implement `Object#hasOwnProperty`, but
                // supports the mutable *proto* property.
                isProperty = function (property) {
                  // Capture and break the object's prototype chain (see section 8.6.2
                  // of the ES 5.1 spec). The parenthesized expression prevents an
                  // unsafe transformation by the Closure Compiler.
                  var original = this.__proto__, result = property in (this.__proto__ = null, this);
                  // Restore the original prototype chain.
                  this.__proto__ = original;
                  return result;
                };
              } else {
                // Capture a reference to the top-level `Object` constructor.
                constructor = members.constructor;
                // Use the `constructor` property to simulate `Object#hasOwnProperty` in
                // other environments.
                isProperty = function (property) {
                  var parent = (this.constructor || constructor).prototype;
                  return property in this && !(property in parent && this[property] === parent[property]);
                };
              }
              members = null;
              return isProperty.call(this, property);
            };
          }
    
          // Internal: Normalizes the `for...in` iteration algorithm across
          // environments. Each enumerated key is yielded to a `callback` function.
          forEach = function (object, callback) {
            var size = 0, Properties, members, property;
    
            // Tests for bugs in the current environment's `for...in` algorithm. The
            // `valueOf` property inherits the non-enumerable flag from
            // `Object.prototype` in older versions of IE, Netscape, and Mozilla.
            (Properties = function () {
              this.valueOf = 0;
            }).prototype.valueOf = 0;
    
            // Iterate over a new instance of the `Properties` class.
            members = new Properties();
            for (property in members) {
              // Ignore all properties inherited from `Object.prototype`.
              if (isProperty.call(members, property)) {
                size++;
              }
            }
            Properties = members = null;
    
            // Normalize the iteration algorithm.
            if (!size) {
              // A list of non-enumerable properties inherited from `Object.prototype`.
              members = ["valueOf", "toString", "toLocaleString", "propertyIsEnumerable", "isPrototypeOf", "hasOwnProperty", "constructor"];
              // IE <= 8, Mozilla 1.0, and Netscape 6.2 ignore shadowed non-enumerable
              // properties.
              forEach = function (object, callback) {
                var isFunction = getClass.call(object) == functionClass, property, length;
                var hasProperty = !isFunction && typeof object.constructor != "function" && objectTypes[typeof object.hasOwnProperty] && object.hasOwnProperty || isProperty;
                for (property in object) {
                  // Gecko <= 1.0 enumerates the `prototype` property of functions under
                  // certain conditions; IE does not.
                  if (!(isFunction && property == "prototype") && hasProperty.call(object, property)) {
                    callback(property);
                  }
                }
                // Manually invoke the callback for each non-enumerable property.
                for (length = members.length; property = members[--length]; hasProperty.call(object, property) && callback(property));
              };
            } else if (size == 2) {
              // Safari <= 2.0.4 enumerates shadowed properties twice.
              forEach = function (object, callback) {
                // Create a set of iterated properties.
                var members = {}, isFunction = getClass.call(object) == functionClass, property;
                for (property in object) {
                  // Store each property name to prevent double enumeration. The
                  // `prototype` property of functions is not enumerated due to cross-
                  // environment inconsistencies.
                  if (!(isFunction && property == "prototype") && !isProperty.call(members, property) && (members[property] = 1) && isProperty.call(object, property)) {
                    callback(property);
                  }
                }
              };
            } else {
              // No bugs detected; use the standard `for...in` algorithm.
              forEach = function (object, callback) {
                var isFunction = getClass.call(object) == functionClass, property, isConstructor;
                for (property in object) {
                  if (!(isFunction && property == "prototype") && isProperty.call(object, property) && !(isConstructor = property === "constructor")) {
                    callback(property);
                  }
                }
                // Manually invoke the callback for the `constructor` property due to
                // cross-environment inconsistencies.
                if (isConstructor || isProperty.call(object, (property = "constructor"))) {
                  callback(property);
                }
              };
            }
            return forEach(object, callback);
          };
    
          // Public: Serializes a JavaScript `value` as a JSON string. The optional
          // `filter` argument may specify either a function that alters how object and
          // array members are serialized, or an array of strings and numbers that
          // indicates which properties should be serialized. The optional `width`
          // argument may be either a string or number that specifies the indentation
          // level of the output.
          if (!has("json-stringify")) {
            // Internal: A map of control characters and their escaped equivalents.
            var Escapes = {
              92: "\\\\",
              34: '\\"',
              8: "\\b",
              12: "\\f",
              10: "\\n",
              13: "\\r",
              9: "\\t"
            };
    
            // Internal: Converts `value` into a zero-padded string such that its
            // length is at least equal to `width`. The `width` must be <= 6.
            var leadingZeroes = "000000";
            var toPaddedString = function (width, value) {
              // The `|| 0` expression is necessary to work around a bug in
              // Opera <= 7.54u2 where `0 == -0`, but `String(-0) !== "0"`.
              return (leadingZeroes + (value || 0)).slice(-width);
            };
    
            // Internal: Double-quotes a string `value`, replacing all ASCII control
            // characters (characters with code unit values between 0 and 31) with
            // their escaped equivalents. This is an implementation of the
            // `Quote(value)` operation defined in ES 5.1 section 15.12.3.
            var unicodePrefix = "\\u00";
            var quote = function (value) {
              var result = '"', index = 0, length = value.length, useCharIndex = !charIndexBuggy || length > 10;
              var symbols = useCharIndex && (charIndexBuggy ? value.split("") : value);
              for (; index < length; index++) {
                var charCode = value.charCodeAt(index);
                // If the character is a control character, append its Unicode or
                // shorthand escape sequence; otherwise, append the character as-is.
                switch (charCode) {
                  case 8: case 9: case 10: case 12: case 13: case 34: case 92:
                    result += Escapes[charCode];
                    break;
                  default:
                    if (charCode < 32) {
                      result += unicodePrefix + toPaddedString(2, charCode.toString(16));
                      break;
                    }
                    result += useCharIndex ? symbols[index] : value.charAt(index);
                }
              }
              return result + '"';
            };
    
            // Internal: Recursively serializes an object. Implements the
            // `Str(key, holder)`, `JO(value)`, and `JA(value)` operations.
            var serialize = function (property, object, callback, properties, whitespace, indentation, stack) {
              var value, className, year, month, date, time, hours, minutes, seconds, milliseconds, results, element, index, length, prefix, result;
              try {
                // Necessary for host object support.
                value = object[property];
              } catch (exception) {}
              if (typeof value == "object" && value) {
                className = getClass.call(value);
                if (className == dateClass && !isProperty.call(value, "toJSON")) {
                  if (value > -1 / 0 && value < 1 / 0) {
                    // Dates are serialized according to the `Date#toJSON` method
                    // specified in ES 5.1 section 15.9.5.44. See section 15.9.1.15
                    // for the ISO 8601 date time string format.
                    if (getDay) {
                      // Manually compute the year, month, date, hours, minutes,
                      // seconds, and milliseconds if the `getUTC*` methods are
                      // buggy. Adapted from @Yaffle's `date-shim` project.
                      date = floor(value / 864e5);
                      for (year = floor(date / 365.2425) + 1970 - 1; getDay(year + 1, 0) <= date; year++);
                      for (month = floor((date - getDay(year, 0)) / 30.42); getDay(year, month + 1) <= date; month++);
                      date = 1 + date - getDay(year, month);
                      // The `time` value specifies the time within the day (see ES
                      // 5.1 section 15.9.1.2). The formula `(A % B + B) % B` is used
                      // to compute `A modulo B`, as the `%` operator does not
                      // correspond to the `modulo` operation for negative numbers.
                      time = (value % 864e5 + 864e5) % 864e5;
                      // The hours, minutes, seconds, and milliseconds are obtained by
                      // decomposing the time within the day. See section 15.9.1.10.
                      hours = floor(time / 36e5) % 24;
                      minutes = floor(time / 6e4) % 60;
                      seconds = floor(time / 1e3) % 60;
                      milliseconds = time % 1e3;
                    } else {
                      year = value.getUTCFullYear();
                      month = value.getUTCMonth();
                      date = value.getUTCDate();
                      hours = value.getUTCHours();
                      minutes = value.getUTCMinutes();
                      seconds = value.getUTCSeconds();
                      milliseconds = value.getUTCMilliseconds();
                    }
                    // Serialize extended years correctly.
                    value = (year <= 0 || year >= 1e4 ? (year < 0 ? "-" : "+") + toPaddedString(6, year < 0 ? -year : year) : toPaddedString(4, year)) +
                      "-" + toPaddedString(2, month + 1) + "-" + toPaddedString(2, date) +
                      // Months, dates, hours, minutes, and seconds should have two
                      // digits; milliseconds should have three.
                      "T" + toPaddedString(2, hours) + ":" + toPaddedString(2, minutes) + ":" + toPaddedString(2, seconds) +
                      // Milliseconds are optional in ES 5.0, but required in 5.1.
                      "." + toPaddedString(3, milliseconds) + "Z";
                  } else {
                    value = null;
                  }
                } else if (typeof value.toJSON == "function" && ((className != numberClass && className != stringClass && className != arrayClass) || isProperty.call(value, "toJSON"))) {
                  // Prototype <= 1.6.1 adds non-standard `toJSON` methods to the
                  // `Number`, `String`, `Date`, and `Array` prototypes. JSON 3
                  // ignores all `toJSON` methods on these objects unless they are
                  // defined directly on an instance.
                  value = value.toJSON(property);
                }
              }
              if (callback) {
                // If a replacement function was provided, call it to obtain the value
                // for serialization.
                value = callback.call(object, property, value);
              }
              if (value === null) {
                return "null";
              }
              className = getClass.call(value);
              if (className == booleanClass) {
                // Booleans are represented literally.
                return "" + value;
              } else if (className == numberClass) {
                // JSON numbers must be finite. `Infinity` and `NaN` are serialized as
                // `"null"`.
                return value > -1 / 0 && value < 1 / 0 ? "" + value : "null";
              } else if (className == stringClass) {
                // Strings are double-quoted and escaped.
                return quote("" + value);
              }
              // Recursively serialize objects and arrays.
              if (typeof value == "object") {
                // Check for cyclic structures. This is a linear search; performance
                // is inversely proportional to the number of unique nested objects.
                for (length = stack.length; length--;) {
                  if (stack[length] === value) {
                    // Cyclic structures cannot be serialized by `JSON.stringify`.
                    throw TypeError();
                  }
                }
                // Add the object to the stack of traversed objects.
                stack.push(value);
                results = [];
                // Save the current indentation level and indent one additional level.
                prefix = indentation;
                indentation += whitespace;
                if (className == arrayClass) {
                  // Recursively serialize array elements.
                  for (index = 0, length = value.length; index < length; index++) {
                    element = serialize(index, value, callback, properties, whitespace, indentation, stack);
                    results.push(element === undef ? "null" : element);
                  }
                  result = results.length ? (whitespace ? "[\n" + indentation + results.join(",\n" + indentation) + "\n" + prefix + "]" : ("[" + results.join(",") + "]")) : "[]";
                } else {
                  // Recursively serialize object members. Members are selected from
                  // either a user-specified list of property names, or the object
                  // itself.
                  forEach(properties || value, function (property) {
                    var element = serialize(property, value, callback, properties, whitespace, indentation, stack);
                    if (element !== undef) {
                      // According to ES 5.1 section 15.12.3: "If `gap` {whitespace}
                      // is not the empty string, let `member` {quote(property) + ":"}
                      // be the concatenation of `member` and the `space` character."
                      // The "`space` character" refers to the literal space
                      // character, not the `space` {width} argument provided to
                      // `JSON.stringify`.
                      results.push(quote(property) + ":" + (whitespace ? " " : "") + element);
                    }
                  });
                  result = results.length ? (whitespace ? "{\n" + indentation + results.join(",\n" + indentation) + "\n" + prefix + "}" : ("{" + results.join(",") + "}")) : "{}";
                }
                // Remove the object from the traversed object stack.
                stack.pop();
                return result;
              }
            };
    
            // Public: `JSON.stringify`. See ES 5.1 section 15.12.3.
            exports.stringify = function (source, filter, width) {
              var whitespace, callback, properties, className;
              if (objectTypes[typeof filter] && filter) {
                if ((className = getClass.call(filter)) == functionClass) {
                  callback = filter;
                } else if (className == arrayClass) {
                  // Convert the property names array into a makeshift set.
                  properties = {};
                  for (var index = 0, length = filter.length, value; index < length; value = filter[index++], ((className = getClass.call(value)), className == stringClass || className == numberClass) && (properties[value] = 1));
                }
              }
              if (width) {
                if ((className = getClass.call(width)) == numberClass) {
                  // Convert the `width` to an integer and create a string containing
                  // `width` number of space characters.
                  if ((width -= width % 1) > 0) {
                    for (whitespace = "", width > 10 && (width = 10); whitespace.length < width; whitespace += " ");
                  }
                } else if (className == stringClass) {
                  whitespace = width.length <= 10 ? width : width.slice(0, 10);
                }
              }
              // Opera <= 7.54u2 discards the values associated with empty string keys
              // (`""`) only if they are used directly within an object member list
              // (e.g., `!("" in { "": 1})`).
              return serialize("", (value = {}, value[""] = source, value), callback, properties, whitespace, "", []);
            };
          }
    
          // Public: Parses a JSON source string.
          if (!has("json-parse")) {
            var fromCharCode = String.fromCharCode;
    
            // Internal: A map of escaped control characters and their unescaped
            // equivalents.
            var Unescapes = {
              92: "\\",
              34: '"',
              47: "/",
              98: "\b",
              116: "\t",
              110: "\n",
              102: "\f",
              114: "\r"
            };
    
            // Internal: Stores the parser state.
            var Index, Source;
    
            // Internal: Resets the parser state and throws a `SyntaxError`.
            var abort = function () {
              Index = Source = null;
              throw SyntaxError();
            };
    
            // Internal: Returns the next token, or `"$"` if the parser has reached
            // the end of the source string. A token may be a string, number, `null`
            // literal, or Boolean literal.
            var lex = function () {
              var source = Source, length = source.length, value, begin, position, isSigned, charCode;
              while (Index < length) {
                charCode = source.charCodeAt(Index);
                switch (charCode) {
                  case 9: case 10: case 13: case 32:
                    // Skip whitespace tokens, including tabs, carriage returns, line
                    // feeds, and space characters.
                    Index++;
                    break;
                  case 123: case 125: case 91: case 93: case 58: case 44:
                    // Parse a punctuator token (`{`, `}`, `[`, `]`, `:`, or `,`) at
                    // the current position.
                    value = charIndexBuggy ? source.charAt(Index) : source[Index];
                    Index++;
                    return value;
                  case 34:
                    // `"` delimits a JSON string; advance to the next character and
                    // begin parsing the string. String tokens are prefixed with the
                    // sentinel `@` character to distinguish them from punctuators and
                    // end-of-string tokens.
                    for (value = "@", Index++; Index < length;) {
                      charCode = source.charCodeAt(Index);
                      if (charCode < 32) {
                        // Unescaped ASCII control characters (those with a code unit
                        // less than the space character) are not permitted.
                        abort();
                      } else if (charCode == 92) {
                        // A reverse solidus (`\`) marks the beginning of an escaped
                        // control character (including `"`, `\`, and `/`) or Unicode
                        // escape sequence.
                        charCode = source.charCodeAt(++Index);
                        switch (charCode) {
                          case 92: case 34: case 47: case 98: case 116: case 110: case 102: case 114:
                            // Revive escaped control characters.
                            value += Unescapes[charCode];
                            Index++;
                            break;
                          case 117:
                            // `\u` marks the beginning of a Unicode escape sequence.
                            // Advance to the first character and validate the
                            // four-digit code point.
                            begin = ++Index;
                            for (position = Index + 4; Index < position; Index++) {
                              charCode = source.charCodeAt(Index);
                              // A valid sequence comprises four hexdigits (case-
                              // insensitive) that form a single hexadecimal value.
                              if (!(charCode >= 48 && charCode <= 57 || charCode >= 97 && charCode <= 102 || charCode >= 65 && charCode <= 70)) {
                                // Invalid Unicode escape sequence.
                                abort();
                              }
                            }
                            // Revive the escaped character.
                            value += fromCharCode("0x" + source.slice(begin, Index));
                            break;
                          default:
                            // Invalid escape sequence.
                            abort();
                        }
                      } else {
                        if (charCode == 34) {
                          // An unescaped double-quote character marks the end of the
                          // string.
                          break;
                        }
                        charCode = source.charCodeAt(Index);
                        begin = Index;
                        // Optimize for the common case where a string is valid.
                        while (charCode >= 32 && charCode != 92 && charCode != 34) {
                          charCode = source.charCodeAt(++Index);
                        }
                        // Append the string as-is.
                        value += source.slice(begin, Index);
                      }
                    }
                    if (source.charCodeAt(Index) == 34) {
                      // Advance to the next character and return the revived string.
                      Index++;
                      return value;
                    }
                    // Unterminated string.
                    abort();
                  default:
                    // Parse numbers and literals.
                    begin = Index;
                    // Advance past the negative sign, if one is specified.
                    if (charCode == 45) {
                      isSigned = true;
                      charCode = source.charCodeAt(++Index);
                    }
                    // Parse an integer or floating-point value.
                    if (charCode >= 48 && charCode <= 57) {
                      // Leading zeroes are interpreted as octal literals.
                      if (charCode == 48 && ((charCode = source.charCodeAt(Index + 1)), charCode >= 48 && charCode <= 57)) {
                        // Illegal octal literal.
                        abort();
                      }
                      isSigned = false;
                      // Parse the integer component.
                      for (; Index < length && ((charCode = source.charCodeAt(Index)), charCode >= 48 && charCode <= 57); Index++);
                      // Floats cannot contain a leading decimal point; however, this
                      // case is already accounted for by the parser.
                      if (source.charCodeAt(Index) == 46) {
                        position = ++Index;
                        // Parse the decimal component.
                        for (; position < length && ((charCode = source.charCodeAt(position)), charCode >= 48 && charCode <= 57); position++);
                        if (position == Index) {
                          // Illegal trailing decimal.
                          abort();
                        }
                        Index = position;
                      }
                      // Parse exponents. The `e` denoting the exponent is
                      // case-insensitive.
                      charCode = source.charCodeAt(Index);
                      if (charCode == 101 || charCode == 69) {
                        charCode = source.charCodeAt(++Index);
                        // Skip past the sign following the exponent, if one is
                        // specified.
                        if (charCode == 43 || charCode == 45) {
                          Index++;
                        }
                        // Parse the exponential component.
                        for (position = Index; position < length && ((charCode = source.charCodeAt(position)), charCode >= 48 && charCode <= 57); position++);
                        if (position == Index) {
                          // Illegal empty exponent.
                          abort();
                        }
                        Index = position;
                      }
                      // Coerce the parsed value to a JavaScript number.
                      return +source.slice(begin, Index);
                    }
                    // A negative sign may only precede numbers.
                    if (isSigned) {
                      abort();
                    }
                    // `true`, `false`, and `null` literals.
                    if (source.slice(Index, Index + 4) == "true") {
                      Index += 4;
                      return true;
                    } else if (source.slice(Index, Index + 5) == "false") {
                      Index += 5;
                      return false;
                    } else if (source.slice(Index, Index + 4) == "null") {
                      Index += 4;
                      return null;
                    }
                    // Unrecognized token.
                    abort();
                }
              }
              // Return the sentinel `$` character if the parser has reached the end
              // of the source string.
              return "$";
            };
    
            // Internal: Parses a JSON `value` token.
            var get = function (value) {
              var results, hasMembers;
              if (value == "$") {
                // Unexpected end of input.
                abort();
              }
              if (typeof value == "string") {
                if ((charIndexBuggy ? value.charAt(0) : value[0]) == "@") {
                  // Remove the sentinel `@` character.
                  return value.slice(1);
                }
                // Parse object and array literals.
                if (value == "[") {
                  // Parses a JSON array, returning a new JavaScript array.
                  results = [];
                  for (;; hasMembers || (hasMembers = true)) {
                    value = lex();
                    // A closing square bracket marks the end of the array literal.
                    if (value == "]") {
                      break;
                    }
                    // If the array literal contains elements, the current token
                    // should be a comma separating the previous element from the
                    // next.
                    if (hasMembers) {
                      if (value == ",") {
                        value = lex();
                        if (value == "]") {
                          // Unexpected trailing `,` in array literal.
                          abort();
                        }
                      } else {
                        // A `,` must separate each array element.
                        abort();
                      }
                    }
                    // Elisions and leading commas are not permitted.
                    if (value == ",") {
                      abort();
                    }
                    results.push(get(value));
                  }
                  return results;
                } else if (value == "{") {
                  // Parses a JSON object, returning a new JavaScript object.
                  results = {};
                  for (;; hasMembers || (hasMembers = true)) {
                    value = lex();
                    // A closing curly brace marks the end of the object literal.
                    if (value == "}") {
                      break;
                    }
                    // If the object literal contains members, the current token
                    // should be a comma separator.
                    if (hasMembers) {
                      if (value == ",") {
                        value = lex();
                        if (value == "}") {
                          // Unexpected trailing `,` in object literal.
                          abort();
                        }
                      } else {
                        // A `,` must separate each object member.
                        abort();
                      }
                    }
                    // Leading commas are not permitted, object property names must be
                    // double-quoted strings, and a `:` must separate each property
                    // name and value.
                    if (value == "," || typeof value != "string" || (charIndexBuggy ? value.charAt(0) : value[0]) != "@" || lex() != ":") {
                      abort();
                    }
                    results[value.slice(1)] = get(lex());
                  }
                  return results;
                }
                // Unexpected token encountered.
                abort();
              }
              return value;
            };
    
            // Internal: Updates a traversed object member.
            var update = function (source, property, callback) {
              var element = walk(source, property, callback);
              if (element === undef) {
                delete source[property];
              } else {
                source[property] = element;
              }
            };
    
            // Internal: Recursively traverses a parsed JSON object, invoking the
            // `callback` function for each value. This is an implementation of the
            // `Walk(holder, name)` operation defined in ES 5.1 section 15.12.2.
            var walk = function (source, property, callback) {
              var value = source[property], length;
              if (typeof value == "object" && value) {
                // `forEach` can't be used to traverse an array in Opera <= 8.54
                // because its `Object#hasOwnProperty` implementation returns `false`
                // for array indices (e.g., `![1, 2, 3].hasOwnProperty("0")`).
                if (getClass.call(value) == arrayClass) {
                  for (length = value.length; length--;) {
                    update(value, length, callback);
                  }
                } else {
                  forEach(value, function (property) {
                    update(value, property, callback);
                  });
                }
              }
              return callback.call(source, property, value);
            };
    
            // Public: `JSON.parse`. See ES 5.1 section 15.12.2.
            exports.parse = function (source, callback) {
              var result, value;
              Index = 0;
              Source = "" + source;
              result = get(lex());
              // If a JSON string contains multiple tokens, it is invalid.
              if (lex() != "$") {
                abort();
              }
              // Reset the parser state.
              Index = Source = null;
              return callback && getClass.call(callback) == functionClass ? walk((value = {}, value[""] = result, value), "", callback) : result;
            };
          }
        }
    
        exports["runInContext"] = runInContext;
        return exports;
      }
    
      if (freeExports && !isLoader) {
        // Export for CommonJS environments.
        runInContext(root, freeExports);
      } else {
        // Export for web browsers and JavaScript engines.
        var nativeJSON = root.JSON,
            previousJSON = root["JSON3"],
            isRestored = false;
    
        var JSON3 = runInContext(root, (root["JSON3"] = {
          // Public: Restores the original value of the global `JSON` object and
          // returns a reference to the `JSON3` object.
          "noConflict": function () {
            if (!isRestored) {
              isRestored = true;
              root.JSON = nativeJSON;
              root["JSON3"] = previousJSON;
              nativeJSON = previousJSON = null;
            }
            return JSON3;
          }
        }));
    
        root.JSON = {
          "parse": JSON3.parse,
          "stringify": JSON3.stringify
        };
      }
    
      // Export for asynchronous module loaders.
      if (isLoader) {
        define(function () {
          return JSON3;
        });
      }
    }).call(this);
    
    }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
    
    },{}],58:[function(require,module,exports){
    /**
     * Helpers.
     */
    
    var s = 1000
    var m = s * 60
    var h = m * 60
    var d = h * 24
    var y = d * 365.25
    
    /**
     * Parse or format the given `val`.
     *
     * Options:
     *
     *  - `long` verbose formatting [false]
     *
     * @param {String|Number} val
     * @param {Object} options
     * @throws {Error} throw an error if val is not a non-empty string or a number
     * @return {String|Number}
     * @api public
     */
    
    module.exports = function (val, options) {
      options = options || {}
      var type = typeof val
      if (type === 'string' && val.length > 0) {
        return parse(val)
      } else if (type === 'number' && isNaN(val) === false) {
        return options.long ?
                fmtLong(val) :
                fmtShort(val)
      }
      throw new Error('val is not a non-empty string or a valid number. val=' + JSON.stringify(val))
    }
    
    /**
     * Parse the given `str` and return milliseconds.
     *
     * @param {String} str
     * @return {Number}
     * @api private
     */
    
    function parse(str) {
      str = String(str)
      if (str.length > 10000) {
        return
      }
      var match = /^((?:\d+)?\.?\d+) *(milliseconds?|msecs?|ms|seconds?|secs?|s|minutes?|mins?|m|hours?|hrs?|h|days?|d|years?|yrs?|y)?$/i.exec(str)
      if (!match) {
        return
      }
      var n = parseFloat(match[1])
      var type = (match[2] || 'ms').toLowerCase()
      switch (type) {
        case 'years':
        case 'year':
        case 'yrs':
        case 'yr':
        case 'y':
          return n * y
        case 'days':
        case 'day':
        case 'd':
          return n * d
        case 'hours':
        case 'hour':
        case 'hrs':
        case 'hr':
        case 'h':
          return n * h
        case 'minutes':
        case 'minute':
        case 'mins':
        case 'min':
        case 'm':
          return n * m
        case 'seconds':
        case 'second':
        case 'secs':
        case 'sec':
        case 's':
          return n * s
        case 'milliseconds':
        case 'millisecond':
        case 'msecs':
        case 'msec':
        case 'ms':
          return n
        default:
          return undefined
      }
    }
    
    /**
     * Short format for `ms`.
     *
     * @param {Number} ms
     * @return {String}
     * @api private
     */
    
    function fmtShort(ms) {
      if (ms >= d) {
        return Math.round(ms / d) + 'd'
      }
      if (ms >= h) {
        return Math.round(ms / h) + 'h'
      }
      if (ms >= m) {
        return Math.round(ms / m) + 'm'
      }
      if (ms >= s) {
        return Math.round(ms / s) + 's'
      }
      return ms + 'ms'
    }
    
    /**
     * Long format for `ms`.
     *
     * @param {Number} ms
     * @return {String}
     * @api private
     */
    
    function fmtLong(ms) {
      return plural(ms, d, 'day') ||
        plural(ms, h, 'hour') ||
        plural(ms, m, 'minute') ||
        plural(ms, s, 'second') ||
        ms + ' ms'
    }
    
    /**
     * Pluralization helper.
     */
    
    function plural(ms, n, name) {
      if (ms < n) {
        return
      }
      if (ms < n * 1.5) {
        return Math.floor(ms / n) + ' ' + name
      }
      return Math.ceil(ms / n) + ' ' + name + 's'
    }
    
    },{}],59:[function(require,module,exports){
    'use strict';
    
    var has = Object.prototype.hasOwnProperty;
    
    /**
     * Simple query string parser.
     *
     * @param {String} query The query string that needs to be parsed.
     * @returns {Object}
     * @api public
     */
    function querystring(query) {
      var parser = /([^=?&]+)=?([^&]*)/g
        , result = {}
        , part;
    
      //
      // Little nifty parsing hack, leverage the fact that RegExp.exec increments
      // the lastIndex property so we can continue executing this loop until we've
      // parsed all results.
      //
      for (;
        part = parser.exec(query);
        result[decodeURIComponent(part[1])] = decodeURIComponent(part[2])
      );
    
      return result;
    }
    
    /**
     * Transform a query string to an object.
     *
     * @param {Object} obj Object that should be transformed.
     * @param {String} prefix Optional prefix.
     * @returns {String}
     * @api public
     */
    function querystringify(obj, prefix) {
      prefix = prefix || '';
    
      var pairs = [];
    
      //
      // Optionally prefix with a '?' if needed
      //
      if ('string' !== typeof prefix) prefix = '?';
    
      for (var key in obj) {
        if (has.call(obj, key)) {
          pairs.push(encodeURIComponent(key) +'='+ encodeURIComponent(obj[key]));
        }
      }
    
      return pairs.length ? prefix + pairs.join('&') : '';
    }
    
    //
    // Expose the module.
    //
    exports.stringify = querystringify;
    exports.parse = querystring;
    
    },{}],60:[function(require,module,exports){
    'use strict';
    
    /**
     * Check if we're required to add a port number.
     *
     * @see https://url.spec.whatwg.org/#default-port
     * @param {Number|String} port Port number we need to check
     * @param {String} protocol Protocol we need to check against.
     * @returns {Boolean} Is it a default port for the given protocol
     * @api private
     */
    module.exports = function required(port, protocol) {
      protocol = protocol.split(':')[0];
      port = +port;
    
      if (!port) return false;
    
      switch (protocol) {
        case 'http':
        case 'ws':
        return port !== 80;
    
        case 'https':
        case 'wss':
        return port !== 443;
    
        case 'ftp':
        return port !== 21;
    
        case 'gopher':
        return port !== 70;
    
        case 'file':
        return false;
      }
    
      return port !== 0;
    };
    
    },{}],61:[function(require,module,exports){
    'use strict';
    
    var required = require('requires-port')
      , lolcation = require('./lolcation')
      , qs = require('querystringify')
      , protocolre = /^([a-z][a-z0-9.+-]*:)?(\/\/)?([\S\s]*)/i;
    
    /**
     * These are the parse rules for the URL parser, it informs the parser
     * about:
     *
     * 0. The char it Needs to parse, if it's a string it should be done using
     *    indexOf, RegExp using exec and NaN means set as current value.
     * 1. The property we should set when parsing this value.
     * 2. Indication if it's backwards or forward parsing, when set as number it's
     *    the value of extra chars that should be split off.
     * 3. Inherit from location if non existing in the parser.
     * 4. `toLowerCase` the resulting value.
     */
    var rules = [
      ['#', 'hash'],                        // Extract from the back.
      ['?', 'query'],                       // Extract from the back.
      ['/', 'pathname'],                    // Extract from the back.
      ['@', 'auth', 1],                     // Extract from the front.
      [NaN, 'host', undefined, 1, 1],       // Set left over value.
      [/:(\d+)$/, 'port', undefined, 1],    // RegExp the back.
      [NaN, 'hostname', undefined, 1, 1]    // Set left over.
    ];
    
    /**
     * @typedef ProtocolExtract
     * @type Object
     * @property {String} protocol Protocol matched in the URL, in lowercase.
     * @property {Boolean} slashes `true` if protocol is followed by "//", else `false`.
     * @property {String} rest Rest of the URL that is not part of the protocol.
     */
    
    /**
     * Extract protocol information from a URL with/without double slash ("//").
     *
     * @param {String} address URL we want to extract from.
     * @return {ProtocolExtract} Extracted information.
     * @api private
     */
    function extractProtocol(address) {
      var match = protocolre.exec(address);
    
      return {
        protocol: match[1] ? match[1].toLowerCase() : '',
        slashes: !!match[2],
        rest: match[3]
      };
    }
    
    /**
     * Resolve a relative URL pathname against a base URL pathname.
     *
     * @param {String} relative Pathname of the relative URL.
     * @param {String} base Pathname of the base URL.
     * @return {String} Resolved pathname.
     * @api private
     */
    function resolve(relative, base) {
      var path = (base || '/').split('/').slice(0, -1).concat(relative.split('/'))
        , i = path.length
        , last = path[i - 1]
        , unshift = false
        , up = 0;
    
      while (i--) {
        if (path[i] === '.') {
          path.splice(i, 1);
        } else if (path[i] === '..') {
          path.splice(i, 1);
          up++;
        } else if (up) {
          if (i === 0) unshift = true;
          path.splice(i, 1);
          up--;
        }
      }
    
      if (unshift) path.unshift('');
      if (last === '.' || last === '..') path.push('');
    
      return path.join('/');
    }
    
    /**
     * The actual URL instance. Instead of returning an object we've opted-in to
     * create an actual constructor as it's much more memory efficient and
     * faster and it pleases my OCD.
     *
     * @constructor
     * @param {String} address URL we want to parse.
     * @param {Object|String} location Location defaults for relative paths.
     * @param {Boolean|Function} parser Parser for the query string.
     * @api public
     */
    function URL(address, location, parser) {
      if (!(this instanceof URL)) {
        return new URL(address, location, parser);
      }
    
      var relative, extracted, parse, instruction, index, key
        , instructions = rules.slice()
        , type = typeof location
        , url = this
        , i = 0;
    
      //
      // The following if statements allows this module two have compatibility with
      // 2 different API:
      //
      // 1. Node.js's `url.parse` api which accepts a URL, boolean as arguments
      //    where the boolean indicates that the query string should also be parsed.
      //
      // 2. The `URL` interface of the browser which accepts a URL, object as
      //    arguments. The supplied object will be used as default values / fall-back
      //    for relative paths.
      //
      if ('object' !== type && 'string' !== type) {
        parser = location;
        location = null;
      }
    
      if (parser && 'function' !== typeof parser) parser = qs.parse;
    
      location = lolcation(location);
    
      //
      // Extract protocol information before running the instructions.
      //
      extracted = extractProtocol(address || '');
      relative = !extracted.protocol && !extracted.slashes;
      url.slashes = extracted.slashes || relative && location.slashes;
      url.protocol = extracted.protocol || location.protocol || '';
      address = extracted.rest;
    
      //
      // When the authority component is absent the URL starts with a path
      // component.
      //
      if (!extracted.slashes) instructions[2] = [/(.*)/, 'pathname'];
    
      for (; i < instructions.length; i++) {
        instruction = instructions[i];
        parse = instruction[0];
        key = instruction[1];
    
        if (parse !== parse) {
          url[key] = address;
        } else if ('string' === typeof parse) {
          if (~(index = address.indexOf(parse))) {
            if ('number' === typeof instruction[2]) {
              url[key] = address.slice(0, index);
              address = address.slice(index + instruction[2]);
            } else {
              url[key] = address.slice(index);
              address = address.slice(0, index);
            }
          }
        } else if (index = parse.exec(address)) {
          url[key] = index[1];
          address = address.slice(0, index.index);
        }
    
        url[key] = url[key] || (
          relative && instruction[3] ? location[key] || '' : ''
        );
    
        //
        // Hostname, host and protocol should be lowercased so they can be used to
        // create a proper `origin`.
        //
        if (instruction[4]) url[key] = url[key].toLowerCase();
      }
    
      //
      // Also parse the supplied query string in to an object. If we're supplied
      // with a custom parser as function use that instead of the default build-in
      // parser.
      //
      if (parser) url.query = parser(url.query);
    
      //
      // If the URL is relative, resolve the pathname against the base URL.
      //
      if (
          relative
        && location.slashes
        && url.pathname.charAt(0) !== '/'
        && (url.pathname !== '' || location.pathname !== '')
      ) {
        url.pathname = resolve(url.pathname, location.pathname);
      }
    
      //
      // We should not add port numbers if they are already the default port number
      // for a given protocol. As the host also contains the port number we're going
      // override it with the hostname which contains no port number.
      //
      if (!required(url.port, url.protocol)) {
        url.host = url.hostname;
        url.port = '';
      }
    
      //
      // Parse down the `auth` for the username and password.
      //
      url.username = url.password = '';
      if (url.auth) {
        instruction = url.auth.split(':');
        url.username = instruction[0] || '';
        url.password = instruction[1] || '';
      }
    
      url.origin = url.protocol && url.host && url.protocol !== 'file:'
        ? url.protocol +'//'+ url.host
        : 'null';
    
      //
      // The href is just the compiled result.
      //
      url.href = url.toString();
    }
    
    /**
     * This is convenience method for changing properties in the URL instance to
     * insure that they all propagate correctly.
     *
     * @param {String} part          Property we need to adjust.
     * @param {Mixed} value          The newly assigned value.
     * @param {Boolean|Function} fn  When setting the query, it will be the function
     *                               used to parse the query.
     *                               When setting the protocol, double slash will be
     *                               removed from the final url if it is true.
     * @returns {URL}
     * @api public
     */
    URL.prototype.set = function set(part, value, fn) {
      var url = this;
    
      switch (part) {
        case 'query':
          if ('string' === typeof value && value.length) {
            value = (fn || qs.parse)(value);
          }
    
          url[part] = value;
          break;
    
        case 'port':
          url[part] = value;
    
          if (!required(value, url.protocol)) {
            url.host = url.hostname;
            url[part] = '';
          } else if (value) {
            url.host = url.hostname +':'+ value;
          }
    
          break;
    
        case 'hostname':
          url[part] = value;
    
          if (url.port) value += ':'+ url.port;
          url.host = value;
          break;
    
        case 'host':
          url[part] = value;
    
          if (/:\d+$/.test(value)) {
            value = value.split(':');
            url.port = value.pop();
            url.hostname = value.join(':');
          } else {
            url.hostname = value;
            url.port = '';
          }
    
          break;
    
        case 'protocol':
          url.protocol = value.toLowerCase();
          url.slashes = !fn;
          break;
    
        case 'pathname':
          url.pathname = value.length && value.charAt(0) !== '/' ? '/' + value : value;
    
          break;
    
        default:
          url[part] = value;
      }
    
      for (var i = 0; i < rules.length; i++) {
        var ins = rules[i];
    
        if (ins[4]) url[ins[1]] = url[ins[1]].toLowerCase();
      }
    
      url.origin = url.protocol && url.host && url.protocol !== 'file:'
        ? url.protocol +'//'+ url.host
        : 'null';
    
      url.href = url.toString();
    
      return url;
    };
    
    /**
     * Transform the properties back in to a valid and full URL string.
     *
     * @param {Function} stringify Optional query stringify function.
     * @returns {String}
     * @api public
     */
    URL.prototype.toString = function toString(stringify) {
      if (!stringify || 'function' !== typeof stringify) stringify = qs.stringify;
    
      var query
        , url = this
        , protocol = url.protocol;
    
      if (protocol && protocol.charAt(protocol.length - 1) !== ':') protocol += ':';
    
      var result = protocol + (url.slashes ? '//' : '');
    
      if (url.username) {
        result += url.username;
        if (url.password) result += ':'+ url.password;
        result += '@';
      }
    
      result += url.host + url.pathname;
    
      query = 'object' === typeof url.query ? stringify(url.query) : url.query;
      if (query) result += '?' !== query.charAt(0) ? '?'+ query : query;
    
      if (url.hash) result += url.hash;
    
      return result;
    };
    
    //
    // Expose the URL parser and some additional properties that might be useful for
    // others or testing.
    //
    URL.extractProtocol = extractProtocol;
    URL.location = lolcation;
    URL.qs = qs;
    
    module.exports = URL;
    
    },{"./lolcation":62,"querystringify":59,"requires-port":60}],62:[function(require,module,exports){
    (function (global){
    'use strict';
    
    var slashes = /^[A-Za-z][A-Za-z0-9+-.]*:\/\//;
    
    /**
     * These properties should not be copied or inherited from. This is only needed
     * for all non blob URL's as a blob URL does not include a hash, only the
     * origin.
     *
     * @type {Object}
     * @private
     */
    var ignore = { hash: 1, query: 1 }
      , URL;
    
    /**
     * The location object differs when your code is loaded through a normal page,
     * Worker or through a worker using a blob. And with the blobble begins the
     * trouble as the location object will contain the URL of the blob, not the
     * location of the page where our code is loaded in. The actual origin is
     * encoded in the `pathname` so we can thankfully generate a good "default"
     * location from it so we can generate proper relative URL's again.
     *
     * @param {Object|String} loc Optional default location object.
     * @returns {Object} lolcation object.
     * @api public
     */
    module.exports = function lolcation(loc) {
      loc = loc || global.location || {};
      URL = URL || require('./');
    
      var finaldestination = {}
        , type = typeof loc
        , key;
    
      if ('blob:' === loc.protocol) {
        finaldestination = new URL(unescape(loc.pathname), {});
      } else if ('string' === type) {
        finaldestination = new URL(loc, {});
        for (key in ignore) delete finaldestination[key];
      } else if ('object' === type) {
        for (key in loc) {
          if (key in ignore) continue;
          finaldestination[key] = loc[key];
        }
    
        if (finaldestination.slashes === undefined) {
          finaldestination.slashes = slashes.test(loc.href);
        }
      }
    
      return finaldestination;
    };
    
    }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
    
    },{"./":61}]},{},[1])(1)
    });
    
    
    //# sourceMappingURL=sockjs.js.map
    